code: function isIgnored(key, ignores) {
      return (
          ignores.indexOf(key) !== -1 ||
          FEATURES[key].alias.some(alias => ignores.indexOf(alias) !== -1)
      )
  }
docs: Checks whether a given key should be ignored or not.
  
  @param {string} key - A key to check.
  @param {string[]} ignores - An array of keys and aliases to be ignored.
  @returns {boolean} `true` if the key should be ignored.