https://freemarker.apache.org/: FreeMarker is a "template engine"; a generic tool to generate text output based on templates. (Apache Software Foundation) 
final class freemarker.core.ConditionalBlock extends freemarker.core.TemplateElement
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: freemarker.core.ConditionalBlock
  super_class: freemarker.core.TemplateElement
{
  static final int TYPE_IF;
    descriptor: I
    flags: (0x0018) ACC_STATIC, ACC_FINAL
    ConstantValue: 0

  static final int TYPE_ELSE;
    descriptor: I
    flags: (0x0018) ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  static final int TYPE_ELSE_IF;
    descriptor: I
    flags: (0x0018) ACC_STATIC, ACC_FINAL
    ConstantValue: 2

  final freemarker.core.Expression condition;
    descriptor: Lfreemarker/core/Expression;
    flags: (0x0010) ACC_FINAL

  private final int type;
    descriptor: I
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  void <init>(freemarker.core.Expression, freemarker.core.TemplateElements, int);
    descriptor: (Lfreemarker/core/Expression;Lfreemarker/core/TemplateElements;I)V
    flags: (0x0000) 
    Code:
      stack=2, locals=4, args_size=4
        start local 0 // freemarker.core.ConditionalBlock this
        start local 1 // freemarker.core.Expression condition
        start local 2 // freemarker.core.TemplateElements children
        start local 3 // int type
         0: .line 40
            aload 0 /* this */
            invokespecial freemarker.core.TemplateElement.<init>:()V
         1: .line 41
            aload 0 /* this */
            aload 1 /* condition */
            putfield freemarker.core.ConditionalBlock.condition:Lfreemarker/core/Expression;
         2: .line 42
            aload 0 /* this */
            aload 2 /* children */
            invokevirtual freemarker.core.ConditionalBlock.setChildren:(Lfreemarker/core/TemplateElements;)V
         3: .line 43
            aload 0 /* this */
            iload 3 /* type */
            putfield freemarker.core.ConditionalBlock.type:I
         4: .line 44
            return
        end local 3 // int type
        end local 2 // freemarker.core.TemplateElements children
        end local 1 // freemarker.core.Expression condition
        end local 0 // freemarker.core.ConditionalBlock this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0    5     0       this  Lfreemarker/core/ConditionalBlock;
            0    5     1  condition  Lfreemarker/core/Expression;
            0    5     2   children  Lfreemarker/core/TemplateElements;
            0    5     3       type  I
    MethodParameters:
           Name  Flags
      condition  
      children   
      type       

  freemarker.core.TemplateElement[] accept(freemarker.core.Environment);
    descriptor: (Lfreemarker/core/Environment;)[Lfreemarker/core/TemplateElement;
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // freemarker.core.ConditionalBlock this
        start local 1 // freemarker.core.Environment env
         0: .line 48
            aload 0 /* this */
            getfield freemarker.core.ConditionalBlock.condition:Lfreemarker/core/Expression;
            ifnull 1
            aload 0 /* this */
            getfield freemarker.core.ConditionalBlock.condition:Lfreemarker/core/Expression;
            aload 1 /* env */
            invokevirtual freemarker.core.Expression.evalToBoolean:(Lfreemarker/core/Environment;)Z
            ifeq 2
         1: .line 49
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            invokevirtual freemarker.core.ConditionalBlock.getChildBuffer:()[Lfreemarker/core/TemplateElement;
            areturn
         2: .line 51
      StackMap locals:
      StackMap stack:
            aconst_null
            areturn
        end local 1 // freemarker.core.Environment env
        end local 0 // freemarker.core.ConditionalBlock this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lfreemarker/core/ConditionalBlock;
            0    3     1   env  Lfreemarker/core/Environment;
    Exceptions:
      throws freemarker.template.TemplateException, java.io.IOException
    MethodParameters:
      Name  Flags
      env   

  protected java.lang.String dump(boolean);
    descriptor: (Z)Ljava/lang/String;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // freemarker.core.ConditionalBlock this
        start local 1 // boolean canonical
         0: .line 56
            new java.lang.StringBuilder
            dup
            invokespecial java.lang.StringBuilder.<init>:()V
            astore 2 /* buf */
        start local 2 // java.lang.StringBuilder buf
         1: .line 57
            iload 1 /* canonical */
            ifeq 2
            aload 2 /* buf */
            bipush 60
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            pop
         2: .line 58
      StackMap locals: java.lang.StringBuilder
      StackMap stack:
            aload 2 /* buf */
            aload 0 /* this */
            invokevirtual freemarker.core.ConditionalBlock.getNodeTypeSymbol:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
         3: .line 59
            aload 0 /* this */
            getfield freemarker.core.ConditionalBlock.condition:Lfreemarker/core/Expression;
            ifnull 6
         4: .line 60
            aload 2 /* buf */
            bipush 32
            invokevirtual java.lang.StringBuilder.append:(C)Ljava/lang/StringBuilder;
            pop
         5: .line 61
            aload 2 /* buf */
            aload 0 /* this */
            getfield freemarker.core.ConditionalBlock.condition:Lfreemarker/core/Expression;
            invokevirtual freemarker.core.Expression.getCanonicalForm:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
         6: .line 63
      StackMap locals:
      StackMap stack:
            iload 1 /* canonical */
            ifeq 11
         7: .line 64
            aload 2 /* buf */
            ldc ">"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
         8: .line 65
            aload 2 /* buf */
            aload 0 /* this */
            invokevirtual freemarker.core.ConditionalBlock.getChildrenCanonicalForm:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
         9: .line 66
            aload 0 /* this */
            invokevirtual freemarker.core.ConditionalBlock.getParentElement:()Lfreemarker/core/TemplateElement;
            instanceof freemarker.core.IfBlock
            ifne 11
        10: .line 67
            aload 2 /* buf */
            ldc "</#if>"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            pop
        11: .line 70
      StackMap locals:
      StackMap stack:
            aload 2 /* buf */
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            areturn
        end local 2 // java.lang.StringBuilder buf
        end local 1 // boolean canonical
        end local 0 // freemarker.core.ConditionalBlock this
      LocalVariableTable:
        Start  End  Slot       Name  Signature
            0   12     0       this  Lfreemarker/core/ConditionalBlock;
            0   12     1  canonical  Z
            1   12     2        buf  Ljava/lang/StringBuilder;
    MethodParameters:
           Name  Flags
      canonical  

  java.lang.String getNodeTypeSymbol();
    descriptor: ()Ljava/lang/String;
    flags: (0x0000) 
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // freemarker.core.ConditionalBlock this
         0: .line 75
            aload 0 /* this */
            getfield freemarker.core.ConditionalBlock.type:I
            iconst_1
            if_icmpne 2
         1: .line 76
            ldc "#else"
            areturn
         2: .line 77
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield freemarker.core.ConditionalBlock.type:I
            ifne 4
         3: .line 78
            ldc "#if"
            areturn
         4: .line 79
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield freemarker.core.ConditionalBlock.type:I
            iconst_2
            if_icmpne 6
         5: .line 80
            ldc "#elseif"
            areturn
         6: .line 82
      StackMap locals:
      StackMap stack:
            new freemarker.core.BugException
            dup
            ldc "Unknown type"
            invokespecial freemarker.core.BugException.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // freemarker.core.ConditionalBlock this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    7     0  this  Lfreemarker/core/ConditionalBlock;

  int getParameterCount();
    descriptor: ()I
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // freemarker.core.ConditionalBlock this
         0: .line 88
            iconst_2
            ireturn
        end local 0 // freemarker.core.ConditionalBlock this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lfreemarker/core/ConditionalBlock;

  java.lang.Object getParameterValue(int);
    descriptor: (I)Ljava/lang/Object;
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // freemarker.core.ConditionalBlock this
        start local 1 // int idx
         0: .line 93
            iload 1 /* idx */
            tableswitch { // 0 - 1
                    0: 1
                    1: 2
              default: 3
          }
         1: .line 94
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield freemarker.core.ConditionalBlock.condition:Lfreemarker/core/Expression;
            areturn
         2: .line 95
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield freemarker.core.ConditionalBlock.type:I
            invokestatic java.lang.Integer.valueOf:(I)Ljava/lang/Integer;
            areturn
         3: .line 96
      StackMap locals:
      StackMap stack:
            new java.lang.IndexOutOfBoundsException
            dup
            invokespecial java.lang.IndexOutOfBoundsException.<init>:()V
            athrow
        end local 1 // int idx
        end local 0 // freemarker.core.ConditionalBlock this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lfreemarker/core/ConditionalBlock;
            0    4     1   idx  I
    MethodParameters:
      Name  Flags
      idx   

  freemarker.core.ParameterRole getParameterRole(int);
    descriptor: (I)Lfreemarker/core/ParameterRole;
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // freemarker.core.ConditionalBlock this
        start local 1 // int idx
         0: .line 102
            iload 1 /* idx */
            tableswitch { // 0 - 1
                    0: 1
                    1: 2
              default: 3
          }
         1: .line 103
      StackMap locals:
      StackMap stack:
            getstatic freemarker.core.ParameterRole.CONDITION:Lfreemarker/core/ParameterRole;
            areturn
         2: .line 104
      StackMap locals:
      StackMap stack:
            getstatic freemarker.core.ParameterRole.AST_NODE_SUBTYPE:Lfreemarker/core/ParameterRole;
            areturn
         3: .line 105
      StackMap locals:
      StackMap stack:
            new java.lang.IndexOutOfBoundsException
            dup
            invokespecial java.lang.IndexOutOfBoundsException.<init>:()V
            athrow
        end local 1 // int idx
        end local 0 // freemarker.core.ConditionalBlock this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    4     0  this  Lfreemarker/core/ConditionalBlock;
            0    4     1   idx  I
    MethodParameters:
      Name  Flags
      idx   

  boolean isNestedBlockRepeater();
    descriptor: ()Z
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // freemarker.core.ConditionalBlock this
         0: .line 111
            iconst_0
            ireturn
        end local 0 // freemarker.core.ConditionalBlock this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lfreemarker/core/ConditionalBlock;
}
SourceFile: "ConditionalBlock.java"