code: def validate_exported_interfaces(object_class, exported_intfs):
      # type: (List[str], List[str]) -> bool
      
      if (
          not exported_intfs
          or not isinstance(exported_intfs, list)
          or not exported_intfs
      ):
          return False
      else:
          for exintf in exported_intfs:
              if exintf not in object_class:
                  return False
      return True
docs: Validates that the exported interfaces are all provided by the service
  
      :param object_class: The specifications of a service
      :param exported_intfs: The exported specifications
      :return: True if the exported specifications are all provided by the service