'Copies an image from a source region to the current region.
:param source_region: Region to copy the node from.
:type source_region: ``str``
:param node_image: NodeImage to copy.
:type node_image: :class:`.NodeImage`:
:param name: name for new image.
:type name: ``str``
:param description: description for new image.
:type name: ``str``
:rtype: :class:`.NodeImage`:
:return: NodeImage instance on success.'

def copy_image(self, source_region, node_image, name, description=None):

    raise NotImplementedError('copy_image    not    implemented    for    this    driver')
