@property
    def size(self):
        top, right, bottom, left = self
        return SizeF(right - left, bottom - top)
Field descriptions are in a desc child element.
dataset/ETHPy150Open ContinuumIO/ashiba/enaml/enaml/layout/geometry.py/BoxF.size--crossover with--dataset/ETHPy150Open ralphm/wokkel/wokkel/test/test_data_form.py/FieldTest.test_fromElementOption