returns the primary name server . concode_field_sep String responsiblePerson concode_elem_sep int expireTime concode_elem_sep long minimumTtl concode_elem_sep long serial concode_elem_sep int refreshTime concode_elem_sep String primaryNameServer concode_elem_sep int retryTime concode_field_sep String responsiblePerson concode_elem_sep int expireTime concode_elem_sep long minimumTtl concode_elem_sep long serial concode_elem_sep int refreshTime concode_elem_sep int retryTime
String function ( ) { return primaryNameServer ; }