@pimms.param<EOL><INDENT>def map_projection(mp):<DEDENT>
if not isinstance(mp, geo.MapProjection):<EOL><INDENT>raise ValueError('<STR_LIT>')<EOL><DEDENT>return pimms.persist(mp)<EOL>
rrm.map_projection is the MapProjection object for the RegisteredRetinotopyModel object rrm.