code: def dependent_on_composite_state(self):
          
          composite_state = NodesCompositeState()
  
          for dependent_on in self.tree.dependent_on:
              node_b = self.find_counterpart_in(dependent_on)
  
              if node_b is None:
                  # special case when counterpart tree has no process with corresponding time_qualifier
                  # for example Financial Monthly has no counterpart in Third-party Daily Report -
                  # so we assume that its not blocked
                  continue
  
              composite_state.enlist(node_b)
  
          return composite_state
docs: method iterates over all nodes that provide dependency to the current node,
              and compile composite state of them all
              :return instance of <NodesCompositeState>