/**
* Turns a separated path or 'key name' in this case to
* an array. If the key name is simply the separator (for example '/')
* then the array should contain a single empty string value
*
* @param {String} key - The separated path/key
* @param {String} separator - The separator
* @returns {String[]}
*/
export default function (key, separator = '/') {
return (key === separator ? '' : key).split(separator);
}