GObject +----GtkAction +----GpwShellCommand
GpwShellCommand implements GtkBuildable.
"command-line" gchar* : Read / Write
GpwShellCommand is a GtkAction with the embedded feature of spawning the shell command specified by its "command-line" property whenever the "activate" signal is emitted.
All fields are private and should not be used directly. Use its public methods instead.