insertRowBefore method
Implementation
void insertRowBefore(int y) {
List<MatrixCell?> row = List.filled(this.width(), null, growable: true);
this.s.insert(y, row);
}
void insertRowBefore(int y) {
List<MatrixCell?> row = List.filled(this.width(), null, growable: true);
this.s.insert(y, row);
}