isNormalForm

Checks if @value is in normal form.

The main reason to do this is to detect if a given chunk of serialized data is in normal form: load the data into a #GVariant using g_variant_new_from_data() and then use this function to check.

If @value is found to be in normal form then it will be marked as being trusted. If the value was already marked as being trusted then this function will immediately return true.

There may be implementation specific restrictions on deeply nested values. GVariant is guaranteed to handle nesting up to at least 64 levels.