https://www.graalvm.org/ 
public interface com.oracle.graal.python.util.BiFunction<T1, T2, R> extends java.util.function.BiFunction<T1, T2, R>
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.graal.python.util.BiFunction
  super_class: java.lang.Object
{
}
Signature: <T1:Ljava/lang/Object;T2:Ljava/lang/Object;R:Ljava/lang/Object;>Ljava/lang/Object;Ljava/util/function/BiFunction<TT1;TT2;TR;>;
SourceFile: "BiFunction.java"
    RuntimeVisibleAnnotations: 
      java.lang.FunctionalInterface()