code: function pluginsForSite( state = [], action ) {
  	switch ( action.type ) {
  		case PLUGIN_SETUP_INSTRUCTIONS_RECEIVE:
  			return action.data;
  		case PLUGIN_SETUP_INSTALL:
  		case PLUGIN_SETUP_ACTIVATE:
  		case PLUGIN_SETUP_CONFIGURE:
  		case PLUGIN_SETUP_FINISH:
  		case PLUGIN_SETUP_ERROR:
  			return state.map( p => plugin( p, action ) );
  		default:
  			return state;
  	}
  }
docs: /*
  Tracks the list of premium plugin objects for a single site