http://www.antlr.org: A framework for constructing recognizers, compilers, and translators from grammatical descriptions containing Java, C#, C++, or Python actions. (ANTLR) 
public class org.antlr.runtime.UnbufferedTokenStream extends org.antlr.runtime.misc.LookaheadStream<org.antlr.runtime.Token> implements org.antlr.runtime.TokenStream
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.antlr.runtime.UnbufferedTokenStream
  super_class: org.antlr.runtime.misc.LookaheadStream
{
  protected org.antlr.runtime.TokenSource tokenSource;
    descriptor: Lorg/antlr/runtime/TokenSource;
    flags: (0x0004) ACC_PROTECTED

  protected int tokenIndex;
    descriptor: I
    flags: (0x0004) ACC_PROTECTED

  protected int channel;
    descriptor: I
    flags: (0x0004) ACC_PROTECTED

  public void <init>(org.antlr.runtime.TokenSource);
    descriptor: (Lorg/antlr/runtime/TokenSource;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.antlr.runtime.UnbufferedTokenStream this
        start local 1 // org.antlr.runtime.TokenSource tokenSource
         0: .line 54
            aload 0 /* this */
            invokespecial org.antlr.runtime.misc.LookaheadStream.<init>:()V
         1: .line 49
            aload 0 /* this */
            iconst_0
            putfield org.antlr.runtime.UnbufferedTokenStream.tokenIndex:I
         2: .line 52
            aload 0 /* this */
            iconst_0
            putfield org.antlr.runtime.UnbufferedTokenStream.channel:I
         3: .line 55
            aload 0 /* this */
            aload 1 /* tokenSource */
            putfield org.antlr.runtime.UnbufferedTokenStream.tokenSource:Lorg/antlr/runtime/TokenSource;
         4: .line 56
            return
        end local 1 // org.antlr.runtime.TokenSource tokenSource
        end local 0 // org.antlr.runtime.UnbufferedTokenStream this
      LocalVariableTable:
        Start  End  Slot         Name  Signature
            0    5     0         this  Lorg/antlr/runtime/UnbufferedTokenStream;
            0    5     1  tokenSource  Lorg/antlr/runtime/TokenSource;
    MethodParameters:
             Name  Flags
      tokenSource  

  public org.antlr.runtime.Token nextElement();
    descriptor: ()Lorg/antlr/runtime/Token;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=2, args_size=1
        start local 0 // org.antlr.runtime.UnbufferedTokenStream this
         0: .line 60
            aload 0 /* this */
            getfield org.antlr.runtime.UnbufferedTokenStream.tokenSource:Lorg/antlr/runtime/TokenSource;
            invokeinterface org.antlr.runtime.TokenSource.nextToken:()Lorg/antlr/runtime/Token;
            astore 1 /* t */
        start local 1 // org.antlr.runtime.Token t
         1: .line 61
            aload 1 /* t */
            aload 0 /* this */
            dup
            getfield org.antlr.runtime.UnbufferedTokenStream.tokenIndex:I
            dup_x1
            iconst_1
            iadd
            putfield org.antlr.runtime.UnbufferedTokenStream.tokenIndex:I
            invokeinterface org.antlr.runtime.Token.setTokenIndex:(I)V
         2: .line 62
            aload 1 /* t */
            areturn
        end local 1 // org.antlr.runtime.Token t
        end local 0 // org.antlr.runtime.UnbufferedTokenStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/antlr/runtime/UnbufferedTokenStream;
            1    3     1     t  Lorg/antlr/runtime/Token;

  public boolean isEOF(org.antlr.runtime.Token);
    descriptor: (Lorg/antlr/runtime/Token;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.antlr.runtime.UnbufferedTokenStream this
        start local 1 // org.antlr.runtime.Token o
         0: .line 66
            aload 1 /* o */
            invokeinterface org.antlr.runtime.Token.getType:()I
            iconst_m1
            if_icmpne 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 1 // org.antlr.runtime.Token o
        end local 0 // org.antlr.runtime.UnbufferedTokenStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/antlr/runtime/UnbufferedTokenStream;
            0    2     1     o  Lorg/antlr/runtime/Token;
    MethodParameters:
      Name  Flags
      o     

  public org.antlr.runtime.TokenSource getTokenSource();
    descriptor: ()Lorg/antlr/runtime/TokenSource;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.antlr.runtime.UnbufferedTokenStream this
         0: .line 69
            aload 0 /* this */
            getfield org.antlr.runtime.UnbufferedTokenStream.tokenSource:Lorg/antlr/runtime/TokenSource;
            areturn
        end local 0 // org.antlr.runtime.UnbufferedTokenStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/antlr/runtime/UnbufferedTokenStream;

  public java.lang.String toString(int, int);
    descriptor: (II)Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=3, args_size=3
        start local 0 // org.antlr.runtime.UnbufferedTokenStream this
        start local 1 // int start
        start local 2 // int stop
         0: .line 72
            ldc "n/a"
            areturn
        end local 2 // int stop
        end local 1 // int start
        end local 0 // org.antlr.runtime.UnbufferedTokenStream this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lorg/antlr/runtime/UnbufferedTokenStream;
            0    1     1  start  I
            0    1     2   stop  I
    MethodParameters:
       Name  Flags
      start  
      stop   

  public java.lang.String toString(org.antlr.runtime.Token, org.antlr.runtime.Token);
    descriptor: (Lorg/antlr/runtime/Token;Lorg/antlr/runtime/Token;)Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=3, args_size=3
        start local 0 // org.antlr.runtime.UnbufferedTokenStream this
        start local 1 // org.antlr.runtime.Token start
        start local 2 // org.antlr.runtime.Token stop
         0: .line 75
            ldc "n/a"
            areturn
        end local 2 // org.antlr.runtime.Token stop
        end local 1 // org.antlr.runtime.Token start
        end local 0 // org.antlr.runtime.UnbufferedTokenStream this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lorg/antlr/runtime/UnbufferedTokenStream;
            0    1     1  start  Lorg/antlr/runtime/Token;
            0    1     2   stop  Lorg/antlr/runtime/Token;
    MethodParameters:
       Name  Flags
      start  
      stop   

  public int LA(int);
    descriptor: (I)I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.antlr.runtime.UnbufferedTokenStream this
        start local 1 // int i
         0: .line 78
            aload 0 /* this */
            iload 1 /* i */
            invokevirtual org.antlr.runtime.UnbufferedTokenStream.LT:(I)Ljava/lang/Object;
            checkcast org.antlr.runtime.Token
            invokeinterface org.antlr.runtime.Token.getType:()I
            ireturn
        end local 1 // int i
        end local 0 // org.antlr.runtime.UnbufferedTokenStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/antlr/runtime/UnbufferedTokenStream;
            0    1     1     i  I
    MethodParameters:
      Name  Flags
      i     

  public org.antlr.runtime.Token get(int);
    descriptor: (I)Lorg/antlr/runtime/Token;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.antlr.runtime.UnbufferedTokenStream this
        start local 1 // int i
         0: .line 82
            new java.lang.UnsupportedOperationException
            dup
            ldc "Absolute token indexes are meaningless in an unbuffered stream"
            invokespecial java.lang.UnsupportedOperationException.<init>:(Ljava/lang/String;)V
            athrow
        end local 1 // int i
        end local 0 // org.antlr.runtime.UnbufferedTokenStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/antlr/runtime/UnbufferedTokenStream;
            0    1     1     i  I
    MethodParameters:
      Name  Flags
      i     

  public java.lang.String getSourceName();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.antlr.runtime.UnbufferedTokenStream this
         0: .line 86
            aload 0 /* this */
            getfield org.antlr.runtime.UnbufferedTokenStream.tokenSource:Lorg/antlr/runtime/TokenSource;
            invokeinterface org.antlr.runtime.TokenSource.getSourceName:()Ljava/lang/String;
            areturn
        end local 0 // org.antlr.runtime.UnbufferedTokenStream this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/antlr/runtime/UnbufferedTokenStream;

  public boolean isEOF(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast org.antlr.runtime.Token
            invokevirtual org.antlr.runtime.UnbufferedTokenStream.isEOF:(Lorg/antlr/runtime/Token;)Z
            ireturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public org.antlr.runtime.Token LT(int);
    descriptor: (I)Lorg/antlr/runtime/Token;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            iload 1
            invokevirtual org.antlr.runtime.UnbufferedTokenStream.LT:(I)Ljava/lang/Object;
            checkcast org.antlr.runtime.Token
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public java.lang.Object nextElement();
    descriptor: ()Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=1, locals=1, args_size=1
         0: .line 1
            aload 0
            invokevirtual org.antlr.runtime.UnbufferedTokenStream.nextElement:()Lorg/antlr/runtime/Token;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Lorg/antlr/runtime/misc/LookaheadStream<Lorg/antlr/runtime/Token;>;Lorg/antlr/runtime/TokenStream;
SourceFile: "UnbufferedTokenStream.java"