https://www.graalvm.org/ 
final class org.graalvm.polyglot.tck.IdentityFunctionResultVerifier implements org.graalvm.polyglot.tck.ResultVerifier
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: org.graalvm.polyglot.tck.IdentityFunctionResultVerifier
  super_class: java.lang.Object
{
  static final org.graalvm.polyglot.tck.ResultVerifier INSTANCE;
    descriptor: Lorg/graalvm/polyglot/tck/ResultVerifier;
    flags: (0x0018) ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=2, locals=0, args_size=0
         0: .line 48
            new org.graalvm.polyglot.tck.IdentityFunctionResultVerifier
            dup
            invokespecial org.graalvm.polyglot.tck.IdentityFunctionResultVerifier.<init>:()V
            putstatic org.graalvm.polyglot.tck.IdentityFunctionResultVerifier.INSTANCE:Lorg/graalvm/polyglot/tck/ResultVerifier;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.graalvm.polyglot.tck.IdentityFunctionResultVerifier this
         0: .line 50
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 51
            return
        end local 0 // org.graalvm.polyglot.tck.IdentityFunctionResultVerifier this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Lorg/graalvm/polyglot/tck/IdentityFunctionResultVerifier;

  public void accept(org.graalvm.polyglot.tck.ResultVerifier$SnippetRun);
    descriptor: (Lorg/graalvm/polyglot/tck/ResultVerifier$SnippetRun;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=7, locals=6, args_size=2
        start local 0 // org.graalvm.polyglot.tck.IdentityFunctionResultVerifier this
        start local 1 // org.graalvm.polyglot.tck.ResultVerifier$SnippetRun snippetRun
         0: .line 54
            aload 1 /* snippetRun */
            invokevirtual org.graalvm.polyglot.tck.ResultVerifier$SnippetRun.getException:()Lorg/graalvm/polyglot/PolyglotException;
            astore 2 /* exception */
        start local 2 // org.graalvm.polyglot.PolyglotException exception
         1: .line 55
            aload 2 /* exception */
            ifnull 3
         2: .line 56
            aload 2 /* exception */
            athrow
         3: .line 59
      StackMap locals: org.graalvm.polyglot.PolyglotException
      StackMap stack:
            aload 1 /* snippetRun */
            invokevirtual org.graalvm.polyglot.tck.ResultVerifier$SnippetRun.getParameters:()Ljava/util/List;
            iconst_0
            invokeinterface java.util.List.get:(I)Ljava/lang/Object;
            checkcast org.graalvm.polyglot.Value
            astore 3 /* parameter */
        start local 3 // org.graalvm.polyglot.Value parameter
         4: .line 60
            aload 3 /* parameter */
            invokestatic org.graalvm.polyglot.tck.TypeDescriptor.forValue:(Lorg/graalvm/polyglot/Value;)Lorg/graalvm/polyglot/tck/TypeDescriptor;
            astore 4 /* parameterType */
        start local 4 // org.graalvm.polyglot.tck.TypeDescriptor parameterType
         5: .line 61
            aload 1 /* snippetRun */
            invokevirtual org.graalvm.polyglot.tck.ResultVerifier$SnippetRun.getResult:()Lorg/graalvm/polyglot/Value;
            invokestatic org.graalvm.polyglot.tck.TypeDescriptor.forValue:(Lorg/graalvm/polyglot/Value;)Lorg/graalvm/polyglot/tck/TypeDescriptor;
            astore 5 /* resultType */
        start local 5 // org.graalvm.polyglot.tck.TypeDescriptor resultType
         6: .line 62
            aload 4 /* parameterType */
            aload 5 /* resultType */
            invokevirtual org.graalvm.polyglot.tck.TypeDescriptor.isAssignable:(Lorg/graalvm/polyglot/tck/TypeDescriptor;)Z
            ifeq 7
            aload 5 /* resultType */
            aload 5 /* resultType */
            invokevirtual org.graalvm.polyglot.tck.TypeDescriptor.isAssignable:(Lorg/graalvm/polyglot/tck/TypeDescriptor;)Z
            ifne 12
         7: .line 63
      StackMap locals: org.graalvm.polyglot.Value org.graalvm.polyglot.tck.TypeDescriptor org.graalvm.polyglot.tck.TypeDescriptor
      StackMap stack:
            new java.lang.AssertionError
            dup
         8: .line 64
            ldc "Identity function result type must contain the parameter type. Parameter type: %s Result type: %s."
            iconst_2
            anewarray java.lang.Object
            dup
            iconst_0
         9: .line 65
            aload 4 /* parameterType */
            aastore
            dup
            iconst_1
        10: .line 66
            aload 5 /* resultType */
            aastore
        11: .line 63
            invokestatic java.lang.String.format:(Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.AssertionError.<init>:(Ljava/lang/Object;)V
            athrow
        12: .line 68
      StackMap locals:
      StackMap stack:
            return
        end local 5 // org.graalvm.polyglot.tck.TypeDescriptor resultType
        end local 4 // org.graalvm.polyglot.tck.TypeDescriptor parameterType
        end local 3 // org.graalvm.polyglot.Value parameter
        end local 2 // org.graalvm.polyglot.PolyglotException exception
        end local 1 // org.graalvm.polyglot.tck.ResultVerifier$SnippetRun snippetRun
        end local 0 // org.graalvm.polyglot.tck.IdentityFunctionResultVerifier this
      LocalVariableTable:
        Start  End  Slot           Name  Signature
            0   13     0           this  Lorg/graalvm/polyglot/tck/IdentityFunctionResultVerifier;
            0   13     1     snippetRun  Lorg/graalvm/polyglot/tck/ResultVerifier$SnippetRun;
            1   13     2      exception  Lorg/graalvm/polyglot/PolyglotException;
            4   13     3      parameter  Lorg/graalvm/polyglot/Value;
            5   13     4  parameterType  Lorg/graalvm/polyglot/tck/TypeDescriptor;
            6   13     5     resultType  Lorg/graalvm/polyglot/tck/TypeDescriptor;
    Exceptions:
      throws org.graalvm.polyglot.PolyglotException
    MethodParameters:
            Name  Flags
      snippetRun  

  public void accept(java.lang.Object);
    descriptor: (Ljava/lang/Object;)V
    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.graalvm.polyglot.tck.ResultVerifier$SnippetRun
            invokevirtual org.graalvm.polyglot.tck.IdentityFunctionResultVerifier.accept:(Lorg/graalvm/polyglot/tck/ResultVerifier$SnippetRun;)V
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
SourceFile: "IdentityFunctionResultVerifier.java"
InnerClasses:
  public final SnippetRun = org.graalvm.polyglot.tck.ResultVerifier$SnippetRun of org.graalvm.polyglot.tck.ResultVerifier