https://www.graalvm.org/ 
class com.oracle.truffle.api.instrumentation.InstrumentationHandler$1 implements java.util.function.BiConsumer<com.oracle.truffle.api.instrumentation.EventBinding$Source<?>[], com.oracle.truffle.api.source.Source>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.api.instrumentation.InstrumentationHandler$1
  super_class: java.lang.Object
{
  final com.oracle.truffle.api.instrumentation.InstrumentationHandler this$0;
    descriptor: Lcom/oracle/truffle/api/instrumentation/InstrumentationHandler;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.oracle.truffle.api.instrumentation.InstrumentationHandler);
    descriptor: (Lcom/oracle/truffle/api/instrumentation/InstrumentationHandler;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.instrumentation.InstrumentationHandler$1 this
         0: .line 116
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.api.instrumentation.InstrumentationHandler$1.this$0:Lcom/oracle/truffle/api/instrumentation/InstrumentationHandler;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.truffle.api.instrumentation.InstrumentationHandler$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/instrumentation/InstrumentationHandler$1;
    MethodParameters:
        Name  Flags
      this$0  final

  public void accept(com.oracle.truffle.api.instrumentation.EventBinding$Source<?>[], com.oracle.truffle.api.source.Source);
    descriptor: ([Lcom/oracle/truffle/api/instrumentation/EventBinding$Source;Lcom/oracle/truffle/api/source/Source;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.oracle.truffle.api.instrumentation.InstrumentationHandler$1 this
        start local 1 // com.oracle.truffle.api.instrumentation.EventBinding$Source[] bindings
        start local 2 // com.oracle.truffle.api.source.Source source
         0: .line 119
            aload 1 /* bindings */
            aload 2 /* source */
            invokestatic com.oracle.truffle.api.instrumentation.InstrumentationHandler.notifySourceLoadedBindings:([Lcom/oracle/truffle/api/instrumentation/EventBinding$Source;Lcom/oracle/truffle/api/source/Source;)V
         1: .line 120
            return
        end local 2 // com.oracle.truffle.api.source.Source source
        end local 1 // com.oracle.truffle.api.instrumentation.EventBinding$Source[] bindings
        end local 0 // com.oracle.truffle.api.instrumentation.InstrumentationHandler$1 this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    2     0      this  Lcom/oracle/truffle/api/instrumentation/InstrumentationHandler$1;
            0    2     1  bindings  [Lcom/oracle/truffle/api/instrumentation/EventBinding$Source;
            0    2     2    source  Lcom/oracle/truffle/api/source/Source;
    Signature: ([Lcom/oracle/truffle/api/instrumentation/EventBinding$Source<*>;Lcom/oracle/truffle/api/source/Source;)V
    MethodParameters:
          Name  Flags
      bindings  
      source    

  public void accept(java.lang.Object, java.lang.Object);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)V
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=3, locals=3, args_size=3
         0: .line 1
            aload 0
            aload 1
            checkcast com.oracle.truffle.api.instrumentation.EventBinding$Source[]
            aload 2
            checkcast com.oracle.truffle.api.source.Source
            invokevirtual com.oracle.truffle.api.instrumentation.InstrumentationHandler$1.accept:([Lcom/oracle/truffle/api/instrumentation/EventBinding$Source;Lcom/oracle/truffle/api/source/Source;)V
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/util/function/BiConsumer<[Lcom/oracle/truffle/api/instrumentation/EventBinding$Source<*>;Lcom/oracle/truffle/api/source/Source;>;
SourceFile: "InstrumentationHandler.java"
EnclosingMethod: com.oracle.truffle.api.instrumentation.InstrumentationHandler
NestHost: com.oracle.truffle.api.instrumentation.InstrumentationHandler
InnerClasses:
  final Source = com.oracle.truffle.api.instrumentation.EventBinding$Source of com.oracle.truffle.api.instrumentation.EventBinding
  com.oracle.truffle.api.instrumentation.InstrumentationHandler$1