<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def moveBy(self, value):
 """ Move the object. **value** must be an iterable containing two :ref:`type-int-float` values defining the x and y values to move the object by. """

        value = normalizers.normalizeTransformationOffset(value)
        self._moveBy(value)