Normalize an optional array-of-strings param. Accepts a real array, a JSON array string, or a bare comma-separated string. Absent or empty yields undefined with no error — "not supplied" is a valid state for every filter that uses this.
undefined
Normalize an optional array-of-strings param. Accepts a real array, a JSON array string, or a bare comma-separated string. Absent or empty yields
undefinedwith no error — "not supplied" is a valid state for every filter that uses this.