https://www.graalvm.org/ 
class com.oracle.svm.truffle.TruffleFeature$1 implements org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.svm.truffle.TruffleFeature$1
  super_class: java.lang.Object
{
  final com.oracle.svm.truffle.TruffleFeature this$0;
    descriptor: Lcom/oracle/svm/truffle/TruffleFeature;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.oracle.svm.truffle.TruffleFeature);
    descriptor: (Lcom/oracle/svm/truffle/TruffleFeature;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // com.oracle.svm.truffle.TruffleFeature$1 this
         0: .line 434
            aload 0 /* this */
            aload 1
            putfield com.oracle.svm.truffle.TruffleFeature$1.this$0:Lcom/oracle/svm/truffle/TruffleFeature;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.svm.truffle.TruffleFeature$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/svm/truffle/TruffleFeature$1;
    MethodParameters:
        Name  Flags
      this$0  final

  public boolean apply(org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext, jdk.vm.ci.meta.ResolvedJavaMethod, org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin$Receiver);
    descriptor: (Lorg/graalvm/compiler/nodes/graphbuilderconf/GraphBuilderContext;Ljdk/vm/ci/meta/ResolvedJavaMethod;Lorg/graalvm/compiler/nodes/graphbuilderconf/InvocationPlugin$Receiver;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=5, args_size=4
        start local 0 // com.oracle.svm.truffle.TruffleFeature$1 this
        start local 1 // org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext b
        start local 2 // jdk.vm.ci.meta.ResolvedJavaMethod targetMethod
        start local 3 // org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin$Receiver receiver
         0: .line 438
            aload 0 /* this */
            getfield com.oracle.svm.truffle.TruffleFeature$1.this$0:Lcom/oracle/svm/truffle/TruffleFeature;
            getfield com.oracle.svm.truffle.TruffleFeature.profilingEnabled:Ljava/lang/Boolean;
            ifnonnull 3
         1: .line 439
            iconst_0
            istore 4 /* constantBoolean */
        start local 4 // boolean constantBoolean
         2: .line 440
            goto 4
        end local 4 // boolean constantBoolean
         3: .line 441
      StackMap locals:
      StackMap stack:
            aload 0 /* this */
            getfield com.oracle.svm.truffle.TruffleFeature$1.this$0:Lcom/oracle/svm/truffle/TruffleFeature;
            getfield com.oracle.svm.truffle.TruffleFeature.profilingEnabled:Ljava/lang/Boolean;
            invokevirtual java.lang.Boolean.booleanValue:()Z
            istore 4 /* constantBoolean */
        start local 4 // boolean constantBoolean
         4: .line 443
      StackMap locals: int
      StackMap stack:
            aload 1 /* b */
            getstatic jdk.vm.ci.meta.JavaKind.Boolean:Ljdk/vm/ci/meta/JavaKind;
            iload 4 /* constantBoolean */
            invokestatic org.graalvm.compiler.nodes.ConstantNode.forBoolean:(Z)Lorg/graalvm/compiler/nodes/ConstantNode;
            invokeinterface org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext.addPush:(Ljdk/vm/ci/meta/JavaKind;Lorg/graalvm/compiler/nodes/ValueNode;)Lorg/graalvm/compiler/nodes/ValueNode;
            pop
         5: .line 444
            iconst_1
            ireturn
        end local 4 // boolean constantBoolean
        end local 3 // org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin$Receiver receiver
        end local 2 // jdk.vm.ci.meta.ResolvedJavaMethod targetMethod
        end local 1 // org.graalvm.compiler.nodes.graphbuilderconf.GraphBuilderContext b
        end local 0 // com.oracle.svm.truffle.TruffleFeature$1 this
      LocalVariableTable:
        Start  End  Slot             Name  Signature
            0    6     0             this  Lcom/oracle/svm/truffle/TruffleFeature$1;
            0    6     1                b  Lorg/graalvm/compiler/nodes/graphbuilderconf/GraphBuilderContext;
            0    6     2     targetMethod  Ljdk/vm/ci/meta/ResolvedJavaMethod;
            0    6     3         receiver  Lorg/graalvm/compiler/nodes/graphbuilderconf/InvocationPlugin$Receiver;
            2    3     4  constantBoolean  Z
            4    6     4  constantBoolean  Z
    MethodParameters:
              Name  Flags
      b             
      targetMethod  
      receiver      
}
SourceFile: "TruffleFeature.java"
EnclosingMethod: com.oracle.svm.truffle.TruffleFeature.registerInvocationPlugins:(Lorg/graalvm/compiler/phases/util/Providers;Lorg/graalvm/compiler/api/replacements/SnippetReflectionProvider;Lorg/graalvm/compiler/nodes/graphbuilderconf/InvocationPlugins;ZZ)V
NestHost: com.oracle.svm.truffle.TruffleFeature
InnerClasses:
  com.oracle.svm.truffle.TruffleFeature$1
  public abstract Receiver = org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin$Receiver of org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin