whole_func_string: function accept_dir(filename, state) {
  	state = state || {};
  	debug.assert(filename).is('string');
  	debug.assert(state).is('object');
  	if(!state.directory) { return; }
  	return true;
  }
func_code_string: function accept_dir(filename, state) {
  	state = state || {};
  	debug.assert(filename).is('string');
  	debug.assert(state).is('object');
  	if(!state.directory) { return; }
  	return true;
  }
func_documentation_string: Returns true if file should be ignored