Use this function to escape the following characters: \n, \r, \t and \.
Free the resources allocated by GtkSourceView. For example it unrefs the singleton objects.
Initializes the GtkSourceView library (e.g. for the internationalization).
Use this function before gtk_source_search_settings_set_search_text(), to unescape the following sequences of characters: \n, \r, \t and \\. The purpose is to easily write those characters in a search entry.