operator <= method

bool operator <= (OffsetBase other)

Less-than-or-equal-to operator. Compares an Offset or Size to another Offset or Size, and returns true if both the horizontal and vertical values of the left-hand-side operand are smaller than or equal to the horizontal and vertical values of the right-hand-side operand respectively. Returns false otherwise.

This is a partial ordering. It is possible for two values to be neither less, nor greater than, nor equal to, another.

Implementation 

bool operator <=(OffsetBase other) => _dx <= other._dx && _dy <= other._dy;