https://www.graalvm.org/ 
class com.oracle.truffle.api.dsl.test.ImplicitCastTest$TestTypeSystem
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.api.dsl.test.ImplicitCastTest$TestTypeSystem
  super_class: java.lang.Object
{
  void <init>();
    descriptor: ()V
    flags: (0x0000) 
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.dsl.test.ImplicitCastTest$TestTypeSystem this
         0: .line 619
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.truffle.api.dsl.test.ImplicitCastTest$TestTypeSystem this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/dsl/test/ImplicitCastTest$TestTypeSystem;

  public static com.oracle.truffle.api.dsl.test.ImplicitCastTest$AbstractString toAbstractStringVector(java.lang.String);
    descriptor: (Ljava/lang/String;)Lcom/oracle/truffle/api/dsl/test/ImplicitCastTest$AbstractString;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // java.lang.String vector
         0: .line 622
            new com.oracle.truffle.api.dsl.test.ImplicitCastTest$ConcreteString
            dup
            invokespecial com.oracle.truffle.api.dsl.test.ImplicitCastTest$ConcreteString.<init>:()V
            areturn
        end local 0 // java.lang.String vector
      LocalVariableTable:
        Start  End  Slot    Name  Signature
            0    1     0  vector  Ljava/lang/String;
    RuntimeInvisibleAnnotations: 
      com.oracle.truffle.api.dsl.ImplicitCast()
    MethodParameters:
        Name  Flags
      vector  
}
SourceFile: "ImplicitCastTest.java"
NestHost: com.oracle.truffle.api.dsl.test.ImplicitCastTest
InnerClasses:
  abstract AbstractString = com.oracle.truffle.api.dsl.test.ImplicitCastTest$AbstractString of com.oracle.truffle.api.dsl.test.ImplicitCastTest
  ConcreteString = com.oracle.truffle.api.dsl.test.ImplicitCastTest$ConcreteString of com.oracle.truffle.api.dsl.test.ImplicitCastTest
  TestTypeSystem = com.oracle.truffle.api.dsl.test.ImplicitCastTest$TestTypeSystem of com.oracle.truffle.api.dsl.test.ImplicitCastTest
    RuntimeInvisibleAnnotations: 
      com.oracle.truffle.api.dsl.TypeSystem()