code: def add_to_query(**terms)
        if is_a? Rescuetime::Collection
          self << terms
          self
        else
          Rescuetime::Collection.new(BASE_PARAMS, state, terms)
        end
      end
docs: Adds terms to the Rescuetime collection query
  
   @param  [Hash] terms             a set of terms to add to the query
   @return [Rescuetime::Collection]