c_gtk_cell_area_request_renderer

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
__gshared extern (C)
void function(GtkCellArea* area, GtkCellRenderer* renderer, GtkOrientation orientation, GtkWidget* widget, int forSize, int* minimumSize, int* naturalSize) c_gtk_cell_area_request_renderer;

Meta