GObject.param_spec_gtype

function param_spec_gtype(name: String, nick: String, blurb: String, is_a_type: GObject.Type, flags: GObject.ParamFlags): GObject.ParamSpec {
    // Gjs wrapper for g_param_spec_gtype()
}

Creates a new GObject.ParamSpecGType instance specifying a %G_TYPE_GTYPE property.

See GObject.ParamSpec.internal for details on property names.

Since 2.10

name: canonical name of the property specified
nick: nick name for the property specified
blurb: description of the property specified
is_a_type: a GLib.Type whose subtypes are allowed as values of the property (use %G_TYPE_NONE for any type)
flags: flags for the property specified
Returns: a newly created parameter specification