https://www.graalvm.org/ 
class com.oracle.truffle.api.debug.DebuggerExecutionLifecycle$1 implements java.util.function.Function<com.oracle.truffle.api.TruffleContext, com.oracle.truffle.api.debug.DebugContext>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.api.debug.DebuggerExecutionLifecycle$1
  super_class: java.lang.Object
{
  final com.oracle.truffle.api.debug.DebuggerExecutionLifecycle this$0;
    descriptor: Lcom/oracle/truffle/api/debug/DebuggerExecutionLifecycle;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.oracle.truffle.api.debug.DebuggerExecutionLifecycle);
    descriptor: (Lcom/oracle/truffle/api/debug/DebuggerExecutionLifecycle;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.debug.DebuggerExecutionLifecycle$1 this
         0: .line 100
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.api.debug.DebuggerExecutionLifecycle$1.this$0:Lcom/oracle/truffle/api/debug/DebuggerExecutionLifecycle;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.truffle.api.debug.DebuggerExecutionLifecycle$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/debug/DebuggerExecutionLifecycle$1;
    MethodParameters:
        Name  Flags
      this$0  final

  public com.oracle.truffle.api.debug.DebugContext apply(com.oracle.truffle.api.TruffleContext);
    descriptor: (Lcom/oracle/truffle/api/TruffleContext;)Lcom/oracle/truffle/api/debug/DebugContext;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // com.oracle.truffle.api.debug.DebuggerExecutionLifecycle$1 this
        start local 1 // com.oracle.truffle.api.TruffleContext c
         0: .line 103
            new com.oracle.truffle.api.debug.DebugContext
            dup
            aload 0 /* this */
            getfield com.oracle.truffle.api.debug.DebuggerExecutionLifecycle$1.this$0:Lcom/oracle/truffle/api/debug/DebuggerExecutionLifecycle;
            aload 1 /* c */
            invokespecial com.oracle.truffle.api.debug.DebugContext.<init>:(Lcom/oracle/truffle/api/debug/DebuggerExecutionLifecycle;Lcom/oracle/truffle/api/TruffleContext;)V
            areturn
        end local 1 // com.oracle.truffle.api.TruffleContext c
        end local 0 // com.oracle.truffle.api.debug.DebuggerExecutionLifecycle$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/debug/DebuggerExecutionLifecycle$1;
            0    1     1     c  Lcom/oracle/truffle/api/TruffleContext;
    MethodParameters:
      Name  Flags
      c     

  public java.lang.Object apply(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Ljava/lang/Object;
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=2, locals=2, args_size=2
         0: .line 1
            aload 0
            aload 1
            checkcast com.oracle.truffle.api.TruffleContext
            invokevirtual com.oracle.truffle.api.debug.DebuggerExecutionLifecycle$1.apply:(Lcom/oracle/truffle/api/TruffleContext;)Lcom/oracle/truffle/api/debug/DebugContext;
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Ljava/util/function/Function<Lcom/oracle/truffle/api/TruffleContext;Lcom/oracle/truffle/api/debug/DebugContext;>;
SourceFile: "DebuggerExecutionLifecycle.java"
EnclosingMethod: com.oracle.truffle.api.debug.DebuggerExecutionLifecycle.getCachedDebugContext:(Lcom/oracle/truffle/api/TruffleContext;)Lcom/oracle/truffle/api/debug/DebugContext;
NestHost: com.oracle.truffle.api.debug.DebuggerExecutionLifecycle
InnerClasses:
  com.oracle.truffle.api.debug.DebuggerExecutionLifecycle$1