https://www.graalvm.org/ 
public class com.oracle.truffle.llvm.asm.amd64.InlineAssemblyParser$PrefixContext extends org.antlr.v4.runtime.ParserRuleContext
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: com.oracle.truffle.llvm.asm.amd64.InlineAssemblyParser$PrefixContext
  super_class: org.antlr.v4.runtime.ParserRuleContext
{
  public org.antlr.v4.runtime.Token op;
    descriptor: Lorg/antlr/v4/runtime/Token;
    flags: (0x0001) ACC_PUBLIC

  public void <init>(org.antlr.v4.runtime.ParserRuleContext, int);
    descriptor: (Lorg/antlr/v4/runtime/ParserRuleContext;I)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // com.oracle.truffle.llvm.asm.amd64.InlineAssemblyParser$PrefixContext this
        start local 1 // org.antlr.v4.runtime.ParserRuleContext parent
        start local 2 // int invokingState
         0: .line 1356
            aload 0 /* this */
            aload 1 /* parent */
            iload 2 /* invokingState */
            invokespecial org.antlr.v4.runtime.ParserRuleContext.<init>:(Lorg/antlr/v4/runtime/ParserRuleContext;I)V
         1: .line 1357
            return
        end local 2 // int invokingState
        end local 1 // org.antlr.v4.runtime.ParserRuleContext parent
        end local 0 // com.oracle.truffle.llvm.asm.amd64.InlineAssemblyParser$PrefixContext this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0    2     0           this  Lcom/oracle/truffle/llvm/asm/amd64/InlineAssemblyParser$PrefixContext;
            0    2     1         parent  Lorg/antlr/v4/runtime/ParserRuleContext;
            0    2     2  invokingState  I
    MethodParameters:
               Name  Flags
      parent         
      invokingState  

  public int getRuleIndex();
    descriptor: ()I
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.llvm.asm.amd64.InlineAssemblyParser$PrefixContext this
         0: .line 1358
            iconst_1
            ireturn
        end local 0 // com.oracle.truffle.llvm.asm.amd64.InlineAssemblyParser$PrefixContext this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/llvm/asm/amd64/InlineAssemblyParser$PrefixContext;
}
SourceFile: "InlineAssemblyParser.java"
NestHost: com.oracle.truffle.llvm.asm.amd64.InlineAssemblyParser
InnerClasses:
  public PrefixContext = com.oracle.truffle.llvm.asm.amd64.InlineAssemblyParser$PrefixContext of com.oracle.truffle.llvm.asm.amd64.InlineAssemblyParser