Update the dimension properties

        Parameters
        ----------
        global_size : int
            Global dimension size (Default value = None)
        lower_extent : int
            Lower dimension extent (Default value = None)
        upper_extent : int
            Upper dimension extent (Default value = None)
        description : str
            Dimension description (Default value = None)

def update(self, global_size=None, lower_extent=None, upper_extent=None,
        description=None):
        """
        Update the dimension properties

        Parameters
        ----------
        global_size : int
            Global dimension size (Default value = None)
        lower_extent : int
            Lower dimension extent (Default value = None)
        upper_extent : int
            Upper dimension extent (Default value = None)
        description : str
            Dimension description (Default value = None)
        """

        if global_size is not None: self._global_size = global_size
        if lower_extent is not None: self._lower_extent = lower_extent
        if upper_extent is not None: self._upper_extent = upper_extent
        if description is not None: self._description = description

        # Check that we've been given valid values
        self.validate()