https://freemarker.apache.org/: FreeMarker is a "template engine"; a generic tool to generate text output based on templates. (Apache Software Foundation) 
class freemarker.template.Template$LineTableBuilder extends java.io.FilterReader
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: freemarker.template.Template$LineTableBuilder
  super_class: java.io.FilterReader
{
  private final int tabSize;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private final java.lang.StringBuilder lineBuf;
    descriptor: Ljava/lang/StringBuilder;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  int lastChar;
    descriptor: I
    flags: (0x0000) 

  boolean closed;
    descriptor: Z
    flags: (0x0000) 

  private java.lang.Exception failure;
    descriptor: Ljava/lang/Exception;
    flags: (0x0002) ACC_PRIVATE

  final freemarker.template.Template this$0;
    descriptor: Lfreemarker/template/Template;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(freemarker.template.Template, java.io.Reader, freemarker.core.ParserConfiguration);
    descriptor: (Lfreemarker/template/Template;Ljava/io/Reader;Lfreemarker/core/ParserConfiguration;)V
    flags: (0x0000) 
    Code:
      stack=3, locals=4, args_size=4
        start local 0 // freemarker.template.Template$LineTableBuilder this
        start local 2 // java.io.Reader r
        start local 3 // freemarker.core.ParserConfiguration parserConfiguration
         0: .line 815
            aload 0 /* this */
            aload 1
            putfield freemarker.template.Template$LineTableBuilder.this$0:Lfreemarker/template/Template;
         1: .line 816
            aload 0 /* this */
            aload 2 /* r */
            invokespecial java.io.FilterReader.<init>:(Ljava/io/Reader;)V
         2: .line 805
            aload 0 /* this */
            new java.lang.StringBuilder
            dup
            invokespecial java.lang.StringBuilder.<init>:()V
            putfield freemarker.template.Template$LineTableBuilder.lineBuf:Ljava/lang/StringBuilder;
         3: .line 817
            aload 0 /* this */
            aload 3 /* parserConfiguration */
            invokeinterface freemarker.core.ParserConfiguration.getTabSize:()I
            putfield freemarker.template.Template$LineTableBuilder.tabSize:I
         4: .line 818
            return
        end local 3 // freemarker.core.ParserConfiguration parserConfiguration
        end local 2 // java.io.Reader r
        end local 0 // freemarker.template.Template$LineTableBuilder this
      LocalVariableTable:
        Start  End  Slot                 Name  Signature
            0    5     0                 this  Lfreemarker/template/Template$LineTableBuilder;
            0    5     2                    r  Ljava/io/Reader;
            0    5     3  parserConfiguration  Lfreemarker/core/ParserConfiguration;
    MethodParameters:
                     Name  Flags
      this$0               final
      r                    
      parserConfiguration  

  public boolean hasFailure();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // freemarker.template.Template$LineTableBuilder this
         0: .line 821
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.failure:Ljava/lang/Exception;
            ifnull 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 0 // freemarker.template.Template$LineTableBuilder this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lfreemarker/template/Template$LineTableBuilder;

  public void throwFailure();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // freemarker.template.Template$LineTableBuilder this
         0: .line 825
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.failure:Ljava/lang/Exception;
            ifnull 6
         1: .line 826
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.failure:Ljava/lang/Exception;
            instanceof java.io.IOException
            ifeq 3
         2: .line 827
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.failure:Ljava/lang/Exception;
            checkcast java.io.IOException
            athrow
         3: .line 829
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.failure:Ljava/lang/Exception;
            instanceof java.lang.RuntimeException
            ifeq 5
         4: .line 830
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.failure:Ljava/lang/Exception;
            checkcast java.lang.RuntimeException
            athrow
         5: .line 832
      StackMap locals:
      StackMap stack:
            new java.lang.reflect.UndeclaredThrowableException
            dup
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.failure:Ljava/lang/Exception;
            invokespecial java.lang.reflect.UndeclaredThrowableException.<init>:(Ljava/lang/Throwable;)V
            athrow
         6: .line 834
      StackMap locals:
      StackMap stack:
            return
        end local 0 // freemarker.template.Template$LineTableBuilder this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0  this  Lfreemarker/template/Template$LineTableBuilder;
    Exceptions:
      throws java.io.IOException

  public int read();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=1
        start local 0 // freemarker.template.Template$LineTableBuilder this
         0: .line 839
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.in:Ljava/io/Reader;
            invokevirtual java.io.Reader.read:()I
            istore 1 /* c */
        start local 1 // int c
         1: .line 840
            aload 0 /* this */
            iload 1 /* c */
            invokevirtual freemarker.template.Template$LineTableBuilder.handleChar:(I)V
         2: .line 841
            iload 1 /* c */
         3: ireturn
        end local 1 // int c
         4: .line 842
      StackMap locals:
      StackMap stack: java.lang.Exception
            astore 1 /* e */
        start local 1 // java.lang.Exception e
         5: .line 843
            aload 0 /* this */
            aload 1 /* e */
            invokevirtual freemarker.template.Template$LineTableBuilder.rememberException:(Ljava/lang/Exception;)Ljava/io/IOException;
            athrow
        end local 1 // java.lang.Exception e
        end local 0 // freemarker.template.Template$LineTableBuilder this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0  this  Lfreemarker/template/Template$LineTableBuilder;
            1    4     1     c  I
            5    6     1     e  Ljava/lang/Exception;
      Exception table:
        from    to  target  type
           0     3       4  Class java.lang.Exception
    Exceptions:
      throws java.io.IOException

  private java.io.IOException rememberException(java.lang.Exception);
    descriptor: (Ljava/lang/Exception;)Ljava/io/IOException;
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // freemarker.template.Template$LineTableBuilder this
        start local 1 // java.lang.Exception e
         0: .line 849
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.closed:Z
            ifne 2
         1: .line 850
            aload 0 /* this */
            aload 1 /* e */
            putfield freemarker.template.Template$LineTableBuilder.failure:Ljava/lang/Exception;
         2: .line 852
      StackMap locals:
      StackMap stack:
            aload 1 /* e */
            instanceof java.io.IOException
            ifeq 4
         3: .line 853
            aload 1 /* e */
            checkcast java.io.IOException
            areturn
         4: .line 855
      StackMap locals:
      StackMap stack:
            aload 1 /* e */
            instanceof java.lang.RuntimeException
            ifeq 6
         5: .line 856
            aload 1 /* e */
            checkcast java.lang.RuntimeException
            athrow
         6: .line 858
      StackMap locals:
      StackMap stack:
            new java.lang.reflect.UndeclaredThrowableException
            dup
            aload 1 /* e */
            invokespecial java.lang.reflect.UndeclaredThrowableException.<init>:(Ljava/lang/Throwable;)V
            athrow
        end local 1 // java.lang.Exception e
        end local 0 // freemarker.template.Template$LineTableBuilder this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0  this  Lfreemarker/template/Template$LineTableBuilder;
            0    7     1     e  Ljava/lang/Exception;
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      e     

  public int read(char[], int, int);
    descriptor: ([CII)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=7, args_size=4
        start local 0 // freemarker.template.Template$LineTableBuilder this
        start local 1 // char[] cbuf
        start local 2 // int off
        start local 3 // int len
         0: .line 864
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.in:Ljava/io/Reader;
            aload 1 /* cbuf */
            iload 2 /* off */
            iload 3 /* len */
            invokevirtual java.io.Reader.read:([CII)I
            istore 4 /* numchars */
        start local 4 // int numchars
         1: .line 865
            iload 2 /* off */
            istore 5 /* i */
        start local 5 // int i
         2: goto 6
         3: .line 866
      StackMap locals: int int
      StackMap stack:
            aload 1 /* cbuf */
            iload 5 /* i */
            caload
            istore 6 /* c */
        start local 6 // char c
         4: .line 867
            aload 0 /* this */
            iload 6 /* c */
            invokevirtual freemarker.template.Template$LineTableBuilder.handleChar:(I)V
        end local 6 // char c
         5: .line 865
            iinc 5 /* i */ 1
      StackMap locals:
      StackMap stack:
         6: iload 5 /* i */
            iload 2 /* off */
            iload 4 /* numchars */
            iadd
            if_icmplt 3
        end local 5 // int i
         7: .line 869
            iload 4 /* numchars */
         8: ireturn
        end local 4 // int numchars
         9: .line 870
      StackMap locals: freemarker.template.Template$LineTableBuilder char[] int int
      StackMap stack: java.lang.Exception
            astore 4 /* e */
        start local 4 // java.lang.Exception e
        10: .line 871
            aload 0 /* this */
            aload 4 /* e */
            invokevirtual freemarker.template.Template$LineTableBuilder.rememberException:(Ljava/lang/Exception;)Ljava/io/IOException;
            athrow
        end local 4 // java.lang.Exception e
        end local 3 // int len
        end local 2 // int off
        end local 1 // char[] cbuf
        end local 0 // freemarker.template.Template$LineTableBuilder this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0   11     0      this  Lfreemarker/template/Template$LineTableBuilder;
            0   11     1      cbuf  [C
            0   11     2       off  I
            0   11     3       len  I
            1    9     4  numchars  I
            2    7     5         i  I
            4    5     6         c  C
           10   11     4         e  Ljava/lang/Exception;
      Exception table:
        from    to  target  type
           0     8       9  Class java.lang.Exception
    Exceptions:
      throws java.io.IOException
    MethodParameters:
      Name  Flags
      cbuf  
      off   
      len   

  public void close();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // freemarker.template.Template$LineTableBuilder this
         0: .line 877
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.lineBuf:Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.length:()I
            ifle 3
         1: .line 878
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.this$0:Lfreemarker/template/Template;
            getfield freemarker.template.Template.lines:Ljava/util/ArrayList;
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.lineBuf:Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokevirtual java.util.ArrayList.add:(Ljava/lang/Object;)Z
            pop
         2: .line 879
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.lineBuf:Ljava/lang/StringBuilder;
            iconst_0
            invokevirtual java.lang.StringBuilder.setLength:(I)V
         3: .line 881
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            invokespecial java.io.FilterReader.close:()V
         4: .line 882
            aload 0 /* this */
            iconst_1
            putfield freemarker.template.Template$LineTableBuilder.closed:Z
         5: .line 883
            return
        end local 0 // freemarker.template.Template$LineTableBuilder this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    6     0  this  Lfreemarker/template/Template$LineTableBuilder;
    Exceptions:
      throws java.io.IOException

  private void handleChar(int);
    descriptor: (I)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=5, locals=4, args_size=2
        start local 0 // freemarker.template.Template$LineTableBuilder this
        start local 1 // int c
         0: .line 886
            iload 1 /* c */
            bipush 10
            if_icmpeq 1
            iload 1 /* c */
            bipush 13
            if_icmpne 10
         1: .line 887
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.lastChar:I
            bipush 13
            if_icmpne 6
            iload 1 /* c */
            bipush 10
            if_icmpne 6
         2: .line 888
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.this$0:Lfreemarker/template/Template;
            getfield freemarker.template.Template.lines:Ljava/util/ArrayList;
            invokevirtual java.util.ArrayList.size:()I
            iconst_1
            isub
            istore 2 /* lastIndex */
        start local 2 // int lastIndex
         3: .line 889
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.this$0:Lfreemarker/template/Template;
            getfield freemarker.template.Template.lines:Ljava/util/ArrayList;
            iload 2 /* lastIndex */
            invokevirtual java.util.ArrayList.get:(I)Ljava/lang/Object;
            checkcast java.lang.String
            astore 3 /* lastLine */
        start local 3 // java.lang.String lastLine
         4: .line 890
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.this$0:Lfreemarker/template/Template;
            getfield freemarker.template.Template.lines:Ljava/util/ArrayList;
            iload 2 /* lastIndex */
            new java.lang.StringBuilder
            dup
            aload 3 /* lastLine */
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            bipush 10
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokevirtual java.util.ArrayList.set:(ILjava/lang/Object;)Ljava/lang/Object;
            pop
        end local 3 // java.lang.String lastLine
        end local 2 // int lastIndex
         5: .line 891
            goto 19
         6: .line 892
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.lineBuf:Ljava/lang/StringBuilder;
            iload 1 /* c */
            i2c
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            pop
         7: .line 893
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.this$0:Lfreemarker/template/Template;
            getfield freemarker.template.Template.lines:Ljava/util/ArrayList;
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.lineBuf:Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokevirtual java.util.ArrayList.add:(Ljava/lang/Object;)Z
            pop
         8: .line 894
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.lineBuf:Ljava/lang/StringBuilder;
            iconst_0
            invokevirtual java.lang.StringBuilder.setLength:(I)V
         9: .line 896
            goto 19
      StackMap locals:
      StackMap stack:
        10: iload 1 /* c */
            bipush 9
            if_icmpne 18
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.tabSize:I
            iconst_1
            if_icmpeq 18
        11: .line 897
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.tabSize:I
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.lineBuf:Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.length:()I
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.tabSize:I
            irem
            isub
            istore 2 /* numSpaces */
        start local 2 // int numSpaces
        12: .line 898
            iconst_0
            istore 3 /* i */
        start local 3 // int i
        13: goto 16
        14: .line 899
      StackMap locals: int int
      StackMap stack:
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.lineBuf:Ljava/lang/StringBuilder;
            bipush 32
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            pop
        15: .line 898
            iinc 3 /* i */ 1
      StackMap locals:
      StackMap stack:
        16: iload 3 /* i */
            iload 2 /* numSpaces */
            if_icmplt 14
        end local 3 // int i
        end local 2 // int numSpaces
        17: .line 901
            goto 19
        18: .line 902
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield freemarker.template.Template$LineTableBuilder.lineBuf:Ljava/lang/StringBuilder;
            iload 1 /* c */
            i2c
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            pop
        19: .line 904
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            iload 1 /* c */
            putfield freemarker.template.Template$LineTableBuilder.lastChar:I
        20: .line 905
            return
        end local 1 // int c
        end local 0 // freemarker.template.Template$LineTableBuilder this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0   21     0       this  Lfreemarker/template/Template$LineTableBuilder;
            0   21     1          c  I
            3    5     2  lastIndex  I
            4    5     3   lastLine  Ljava/lang/String;
           12   17     2  numSpaces  I
           13   17     3          i  I
    MethodParameters:
      Name  Flags
      c     
}
SourceFile: "Template.java"
NestHost: freemarker.template.Template
InnerClasses:
  private LineTableBuilder = freemarker.template.Template$LineTableBuilder of freemarker.template.Template