code: def complex_increases_activity(graph: BELGraph, u: BaseEntity, v: BaseEntity, key: str) -> bool:
      
      return (
          isinstance(u, (ComplexAbundance, NamedComplexAbundance)) and
          complex_has_member(graph, u, v) and
          part_has_modifier(graph[u][v][key], OBJECT, ACTIVITY)
      )
docs: Return if the formation of a complex with u increases the activity of v.