GParamSpec *predicate_spec =
g_param_spec_pointer ("predicate",
"Predicate",
GParamSpec *predicate_spec =
g_param_spec_pointer ("predicate",
"Predicate",
G_PARAM_READABLE | G_PARAM_WRITABLE);
GParamSpec *selection_mode_spec =
g_param_spec_enum ("selection-mode",
"Selection Mode",
G_PARAM_READABLE | G_PARAM_WRITABLE);
GParamSpec *selection_mode_spec =
g_param_spec_enum ("selection-mode",
"Selection Mode",