https://openjdk.java.net/ 
public interface jdk.internal.access.JavaNetURLAccess
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: jdk.internal.access.JavaNetURLAccess
  super_class: java.lang.Object
{
  public abstract java.net.URLStreamHandler getHandler(java.net.URL);
    descriptor: (Ljava/net/URL;)Ljava/net/URLStreamHandler;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      u     
}
SourceFile: "JavaNetURLAccess.java"