# File lib/aws/core/xml_grammar.rb, line 684
        def consume_initial_frame(child_frame)
          if child_frame.forced?
            add_mutators_for(child_frame)
            if child_frame.collected?
              invoke_setter(child_frame, child_frame.initial_collection)
            else
              # this allows nested forced elements to appear
              invoke_setter(child_frame, child_frame.value)
            end
          end
        end