https://www.graalvm.org/ 
public interface com.oracle.truffle.api.object.Shape$Pred<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.truffle.api.object.Shape$Pred
  super_class: java.lang.Object
{
  public abstract boolean test();
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (TT;)Z
    MethodParameters:
      Name  Flags
      t     
}
Signature: <T:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "Shape.java"
NestHost: com.oracle.truffle.api.object.Shape
InnerClasses:
  public abstract Pred = com.oracle.truffle.api.object.Shape$Pred of com.oracle.truffle.api.object.Shape
    RuntimeVisibleAnnotations: 
      java.lang.Deprecated()