code: public static Pattern inSameActiveComplex()
  	{
  		Pattern p = inSameComplex();
  		p.add(new ActivityConstraint(true), "Complex");
  		return p;
  	}
docs: Pattern for two different EntityReference have member PhysicalEntity in the same Complex, and
  the Complex has an activity. Complex membership can be through multiple nesting and/or
  through homology relations.
  @return the pattern