c_gtk_cell_area_render

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, GtkCellAreaContext* context, GtkWidget* widget, cairo_t* cr, GdkRectangle* backgroundArea, GdkRectangle* cellArea, GtkCellRendererState flags, gboolean paintFocus) c_gtk_cell_area_render;

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