module RubyXL::OOXMLObjectInstanceMethods

def before_write_xml

the collection's root node if the collection is empty).
along with option to terminate the actual write if +false+ is returned (for example, to avoid writing
Subclass provided filter to perform last-minute operations (cleanup, count, etc.) immediately prior to write, 
def before_write_xml
  #TODO# This will go away once containers are fully implemented.

  child_nodes = obtain_class_variable(:@@ooxml_child_nodes)
  child_nodes.each_pair { |child_node_name, child_node_params|
    self.count = self.send(child_node_params[:accessor]).size if child_node_params[:is_array] == :with_count
  }
  true
end