GLib.Variant.prototype.get_uint64
function get_uint64(): Number(guint64) {
    // Gjs wrapper for g_variant_get_uint64()
}
  Returns the 64-bit unsigned integer value of value.
It is an error to call this function with a value of any type other than %G_VARIANT_TYPE_UINT64.
Since 2.24
- Returns
 a #guint64