transformed method
Return a point transformed by this matrix.
Implementation
Point<double> transformed(Point<double> p) => Point(
p.x * _get(0, 0) + p.y * _get(0, 1) + _get(0, 2),
p.x * _get(1, 0) + p.y * _get(1, 1) + _get(1, 2),
);