Associate a #GtkSourceLanguage with the buffer. If @language is
not-%NULL and syntax highlighting is enabled (see gtk_source_buffer_set_highlight_syntax()),
the syntax patterns defined in @language will be used to highlight the text
contained in the buffer. If @language is %NULL, the text contained in the
buffer is not highlighted.
Associate a #GtkSourceLanguage with the buffer. If @language is not-%NULL and syntax highlighting is enabled (see gtk_source_buffer_set_highlight_syntax()), the syntax patterns defined in @language will be used to highlight the text contained in the buffer. If @language is %NULL, the text contained in the buffer is not highlighted.
The buffer holds a reference to @language.