https://openjdk.java.net/ 
interface sun.lwawt.macosx.CFRetainedResource$CFNativeActionGet
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.lwawt.macosx.CFRetainedResource$CFNativeActionGet
  super_class: java.lang.Object
{
  public abstract long run(long);
    descriptor: (J)J
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      ptr   
}
SourceFile: "CFRetainedResource.java"
NestHost: sun.lwawt.macosx.CFRetainedResource
InnerClasses:
  abstract CFNativeActionGet = sun.lwawt.macosx.CFRetainedResource$CFNativeActionGet of sun.lwawt.macosx.CFRetainedResource