static void psppire_custom_entry_class_init (PsppireCustomEntryClass *klass);
static void psppire_custom_entry_init (PsppireCustomEntry *ce);
static void psppire_custom_entry_class_init (PsppireCustomEntryClass *klass);
static void psppire_custom_entry_init (PsppireCustomEntry *ce);
g_return_val_if_fail (PSPPIRE_IS_CUSTOM_ENTRY (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
g_return_val_if_fail (PSPPIRE_IS_CUSTOM_ENTRY (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);