parameters: (self)
docstring: Return True if all items are different in the container, UNKNOWN if some items are
          indeterminate, or False otherwise
docstring_summary: Return True if all items are different in the container, UNKNOWN if some items are
          indeterminate, or False otherwise
docstring_tokens: Return True if all items are different in the container UNKNOWN if some items are indeterminate or False otherwise
function: def get_value_unique(self):
          ''' Return True if all items are different in the container, UNKNOWN if some items are
          indeterminate, or False otherwise'''
          if None in self._container:
              return Unknown
          if self.get_size()-len(set(self._container))>0: #some items are repeated
              return False
          else:
              return True
function_tokens: def get_value_unique ( self ) : if None in self . _container : return Unknown if self . get_size ( ) - len ( set ( self . _container ) ) > 0 : #some items are repeated return False else : return True