utility function to determine the presence of a key . the default is false . concode_field_sep Logger LOG concode_elem_sep Collection<Object[]> listeners concode_field_sep String getParsingHelp concode_elem_sep void removeElementListener concode_elem_sep void cleanListener concode_elem_sep void updateListener concode_elem_sep void addElementListener concode_elem_sep void addElementListener concode_elem_sep void addElementListener concode_elem_sep void removeAllElementListeners concode_elem_sep String toString concode_elem_sep void parse concode_elem_sep void initialiseListener