docs: function parse_field_top(obj, key, value) {
  			if( is.array(obj['$'+key]) ) {
  				obj['$'+key] = obj['$'+key].concat(value);
  			} else if( is.obj(obj['$'+key]) ) {
  				obj['$'+key] = merge(obj['$'+key], value);
  			} else {
  				obj['$'+key] = value;
  			}
  		}