pub unsafe extern "C" fn gtk_property_expression_new_for_pspec(
expression: *mut GtkExpression,
pspec: *mut GParamSpec,
) -> *mut GtkPropertyExpression
pub unsafe extern "C" fn gtk_property_expression_new_for_pspec(
expression: *mut GtkExpression,
pspec: *mut GParamSpec,
) -> *mut GtkPropertyExpression