anchor: Transform:apply
  Applies the given other Transform object to this one.
  
  This effectively multiplies this Transform's internal transformation matrix with the other Transform's (i.e. self * other), and stores the result in this object.
  transform = Transform:apply( other )
  other Transform The other Transform object to apply to this Transform.
  transform Transform The Transform object the method was called on. Allows easily chaining Transform methods.