'Returns whether the given branch is a sub-tree of this transform on
each seperate dimension.
A common use for this method is to identify if a transform is a blended
transform containing an axes\' data transform. e.g.::
x_isdata, y_isdata = trans.contains_branch_seperately(ax.transData)'

def contains_branch_seperately(self, other_transform):

    if (self.output_dims != 2):
        raise ValueError(u'contains_branch_seperately    only    supports    transforms    with    2    output    dimensions')
    return ([self.contains_branch(other_transform)] * 2)
