code: function _gpfInterfaceQueryTryIUnknown(interfaceSpecifier, queriedObject) {
          if (_gpfInterfaceIsImplementedBy(gpf.interfaces.IUnknown, queriedObject)) {
              return _gpfInterfaceQueryThroughIUnknown(interfaceSpecifier, queriedObject);
          }
      }
docs: Retrieve an object implementing the expected interface from an object trying the IUnknown interface
  
  @param {Function} interfaceSpecifier Reference interface
  @param {Object} queriedObject Object to query
  @return {Object|null|undefined} Object implementing the interface or null,
  undefined is returned when IUnknown is not implemented
  @since 0.1.8