function isEmpty (value) {
return value === undefined ||
  (typeof value === 'object' && Object.keys(value).length === 0) ||
  (typeof value === 'string' && value.trim().length === 0) ||
  (Buffer.isBuffer(value) && value.length === 0);
}
Determines whether the parsed value is "empty".

@param {*} value
@returns {boolean}