void IVisitor.VisitOnMerge(MergeStmt mergeStmt) { this.ParentExists(mergeStmt); }
void IVisitor.VisitOnUsing(MergeStmt mergeStmt, int offset) { this.ParentExists(mergeStmt); }
void IVisitor.VisitAfter(MergeStmt mergeStmt) { this.ParentExists(mergeStmt); }