void lttv_filter_destroy(LttvFilter* filter);
-gboolean lttv_filter_append_expression(LttvFilter* filter, char *expression);
+gboolean lttv_filter_append_expression(LttvFilter* filter, const char *expression);
void lttv_filter_clear_expression(LttvFilter* filter);
/*
* Debug functions
*/
-void lttv_print_tree(const LttvFilterTree* t);
+void lttv_print_tree(const LttvFilterTree* t, const int count);
#endif // FILTER_H