code: function addAction(state, action) {
    const action_id = uuid.v4();
  
    const new_action = {};
    new_action[action_id] = action;
  
    const new_actions = Object.assign({}, state.actions, new_action);
    return Object.assign({}, state, {actions: new_actions});
  }
docs: Add a WFS action to the state.
  @param {Object} state Current state.
  @param {Object} action Action to handle.
  
  @returns {Object} The new state.