returns the user principal responsible for the event . concode_field_sep String principal concode_elem_sep Map<String,Object> data concode_elem_sep String type concode_elem_sep Date timestamp concode_field_sep String getType concode_elem_sep Date getTimestamp concode_elem_sep String toString concode_elem_sep Map<String,Object> convert concode_elem_sep Map<String,Object> getData
String function ( ) { return this . principal ; }