code: function getChoices() {
      return {
        roleIdentifiers: () => {
          return plugin.loadRoles()
          .then(roles => {
            // Build the list of available roles for input verification and interactive selection
            return _.map(roles, role => {
              return {
                value: role.name,
                name: role.name + (role.description ? ' - ' + role.description : '')
              };
            });
          });
        }
      };
    }
docs: Build the choices for "list" and "checkbox" parameters
  @param {Array} endpoints - the list o available endpoint specifications
  @returns {Object} - collection of lists of choices for "list" and "checkbox" parameters