c_gtk_cell_renderer_start_editing

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)
GtkCellEditable* function(GtkCellRenderer* cell, GdkEvent* event, GtkWidget* widget, const(char)* path, GdkRectangle* backgroundArea, GdkRectangle* cellArea, GtkCellRendererState flags) c_gtk_cell_renderer_start_editing;

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