private String inPackage(String topLevel, String... nested) {
    return DOT_JOINER.join(null, topLevel, (Object[]) nested);
  }
private String inPackage(String topLevel, String... nested) {
    return DOT_JOINER.join(null, topLevel, (Object[]) nested);
  }
private String inPackage ( String topLevel , String ... nested ) { return DOT_JOINER . join ( null , topLevel , ( Object [ ] ) nested ) ; }
Package relative path
@param topLevel
@param nested
@return
Package relative path