def __init__(self, phase_name, tag_phases=True, phase_folders=None, galaxies=None,<EOL>optimizer_class=non_linear.MultiNest,<EOL>sub_grid_size=<NUM_LIT:2>, bin_up_factor=None, image_psf_shape=None, positions_threshold=None,<EOL>mask_function=None,<EOL>inner_mask_radii=None, cosmology=cosmo.Planck15, auto_link_priors=False):
super(MultiPlanePhase, self).__init__(phase_name=phase_name,<EOL>tag_phases=tag_phases,<EOL>phase_folders=phase_folders,<EOL>optimizer_class=optimizer_class,<EOL>sub_grid_size=sub_grid_size,<EOL>bin_up_factor=bin_up_factor,<EOL>image_psf_shape=image_psf_shape,<EOL>positions_threshold=positions_threshold,<EOL>mask_function=mask_function,<EOL>inner_mask_radii=inner_mask_radii,<EOL>cosmology=cosmology,<EOL>auto_link_priors=auto_link_priors)<EOL>self.galaxies = galaxies<EOL>
A phase with a simple source/lens model

Parameters
----------
galaxies : [g.Galaxy] | [gm.GalaxyModel]
    A galaxy that acts as a gravitational lens or is being lensed
optimizer_class: class
    The class of a non-linear optimizer
sub_grid_size: int
    The side length of the subgrid