Inflates this LeadRectD by the specified amount.
width
The amount to inflate this LeadRectD horizontally.
height
The amount to inflate this LeadRectD vertically.
This method inflates the rectangle itself, not a copy of it. The inflation along an axis is in two directions (negative direction and positive direction). For example, if a 150 by 150 rectangle is inflated by 50 in the x-axis, the resulting rectangle will be 250 units long (the original 150 plus the 50 in the negative direction, and the 50 in the positive direction) maintaining the rectangle's geometric center. If either width or height is negative, the rectangle is deflated in the corresponding direction.