code: function findVariableForAliases(varNames, aliases) {
    for (var j = 0; j < aliases.length; j++) {
      var re = new RegExp("^" + aliases[j] + "$", "i");
      for (var i = 0; i < varNames.length; i++) {
        if (re.test(varNames[i])) {
          return varNames[i];
        }
      }
    }
    return undefined;
  }
docs: Function interface for matching a URL to a {@link CatalogMember} constructor
  for that URL.
  @private
  @callback RegionProvider~colorFunction
  @param {Number} value The value for this region.
  @returns {Number[]} Returns a colorArray in the form [r, g, b, a].