GtkTextViewClass.extendSelection

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
struct GtkTextViewClass
extern (C)
int function(GtkTextView* textView, GtkTextExtendSelection granularity, GtkTextIter* location, GtkTextIter* start, GtkTextIter* end) extendSelection;

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