https://www.graalvm.org/ 
public interface com.oracle.truffle.object.CoreLocations$ObjectLocation extends com.oracle.truffle.object.CoreLocations$TypedLocation, com.oracle.truffle.api.object.ObjectLocation
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.truffle.object.CoreLocations$ObjectLocation
  super_class: java.lang.Object
{
  public abstract java.lang.Class<? extends java.lang.Object> getType();
    descriptor: ()Ljava/lang/Class;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: ()Ljava/lang/Class<+Ljava/lang/Object;>;

  public abstract boolean isNonNull();
    descriptor: ()Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "CoreLocations.java"
NestHost: com.oracle.truffle.object.CoreLocations
InnerClasses:
  public abstract ObjectLocation = com.oracle.truffle.object.CoreLocations$ObjectLocation of com.oracle.truffle.object.CoreLocations
  public abstract TypedLocation = com.oracle.truffle.object.CoreLocations$TypedLocation of com.oracle.truffle.object.CoreLocations