gvariantDeserialize

Converts a JSON data structure to a [glib.variant.Variant].

If signature is not NULL, it will be used to resolve ambiguous data types.

If no error occurs, the resulting [glib.variant.Variant] is guaranteed to conform to signature.

If signature is not NULL but does not represent a valid [glib.variant.Variant] type string, NULL is returned and the error is set to [gio.types.IOErrorEnum.InvalidArgument].

If a signature is provided but the JSON structure cannot be mapped to it, NULL is returned and the error is set to [gio.types.IOErrorEnum.InvalidData].

If signature is NULL, the conversion is done based strictly on the types in the JSON nodes.

The returned variant has a floating reference that will need to be sunk by the caller code.