Looks up the flags type nicks for the bits specified by
value, puts them in an array of strings and writes the array to
, within this.
It is a programmer error to give a
key that isn't contained in the schema for this or is not
marked as a flags type, or for
value to contain any bits that are not value for the named type.
After performing the write, accessing
key directly with get_strv
will return an array of 'nicks'; one for each bit in
a Settings object
a key, within this
a flags value
true, if the set succeeds