widget set to None, label set to None, initial set to None, help_text set to an empty strign, unpacked list args and unpacked dictionary kwargs. call the method __init__ from the base class of the class ModelMultipleChoiceField, with 10 arguments: queryset, None,
super ( ModelMultipleChoiceField , self ) . __init__ ( queryset , None , cache_choices , required , widget , label , initial , help_text , * args , ** kwargs )