https://www.graalvm.org/ 
abstract class org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl
  minor version: 0
  major version: 59
  flags: flags: (0x0420) ACC_SUPER, ACC_ABSTRACT
  this_class: org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl
  super_class: java.lang.Object
{
  private void <init>();
    descriptor: ()V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl this
         0: .line 726
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/graalvm/polyglot/tck/TypeDescriptor$TypeDescriptorImpl;

  abstract boolean isAssignable(org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl, org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl);
    descriptor: (Lorg/graalvm/polyglot/tck/TypeDescriptor$TypeDescriptorImpl;Lorg/graalvm/polyglot/tck/TypeDescriptor$TypeDescriptorImpl;)Z
    flags: (0x0400) ACC_ABSTRACT
    MethodParameters:
          Name  Flags
      origType  
      byType    

  org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl other(org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl, org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl);
    descriptor: (Lorg/graalvm/polyglot/tck/TypeDescriptor$TypeDescriptorImpl;Lorg/graalvm/polyglot/tck/TypeDescriptor$TypeDescriptorImpl;)Lorg/graalvm/polyglot/tck/TypeDescriptor$TypeDescriptorImpl;
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl this
        start local 1 // org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl td1
        start local 2 // org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl td2
         0: .line 731
            aload 1 /* td1 */
            aload 0 /* this */
            if_acmpne 2
         1: .line 732
            aload 2 /* td2 */
            areturn
         2: .line 734
      StackMap locals:
      StackMap stack:
            aload 2 /* td2 */
            aload 0 /* this */
            if_acmpne 4
         3: .line 735
            aload 1 /* td1 */
            areturn
         4: .line 737
      StackMap locals:
      StackMap stack:
            new java.lang.IllegalArgumentException
            dup
            invokespecial java.lang.IllegalArgumentException.<init>:()V
            athrow
        end local 2 // org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl td2
        end local 1 // org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl td1
        end local 0 // org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0  this  Lorg/graalvm/polyglot/tck/TypeDescriptor$TypeDescriptorImpl;
            0    5     1   td1  Lorg/graalvm/polyglot/tck/TypeDescriptor$TypeDescriptorImpl;
            0    5     2   td2  Lorg/graalvm/polyglot/tck/TypeDescriptor$TypeDescriptorImpl;
    MethodParameters:
      Name  Flags
      td1   
      td2   
}
SourceFile: "TypeDescriptor.java"
NestHost: org.graalvm.polyglot.tck.TypeDescriptor
InnerClasses:
  private abstract TypeDescriptorImpl = org.graalvm.polyglot.tck.TypeDescriptor$TypeDescriptorImpl of org.graalvm.polyglot.tck.TypeDescriptor