private ActionDetector buildActionDetector(GuidedDecisionTable52 model,
ActionCol52 actionCol,
DTCellValue52 realCellValue) {
ActionDetectorKey key;
if ( actionCol instanceof ActionSetFieldCol52 ) {
key = new SetFieldColActionDetectorKey( (ActionSetFieldCol52) actionCol );
} else if ( actionCol instanceof ActionInsertFactCol52 ) {
key = new InsertFactActionDetectorKey( (ActionInsertFactCol52) actionCol );
} else {
key = new UnrecognizedActionDetectorKey( actionCol );
}