having method
Implementation
Matrix<T> having({int? ld, int? lastd, ({int x, int y})? offset}) => Matrix._(
_entries,
(
ld ?? this.dimensions.$1,
ld != null && ld > 0 ? length ~/ ld : this.dimensions.$2
),
(ld ?? this._strides.$1, this._strides.$2),
offset: offset ?? this.offset,
);