Returns true if any one of the channel, height, or width ranges of this shape allow more than one input value.

def isFlexible(self):
        """
        Returns true if any one of the channel, height, or width ranges of this shape allow more than one input value.
        """
        for key, value in self.arrayShapeRange.items():
            if key in _CONSTRAINED_KEYS:
                if value.isFlexible:
                    return True

        return False