Function called when the key combination is pressed, or @c NULL to use the group callback * (preferred). @see plugin_set_key_group().
< Key value in lower-case, such as @c GDK_a or 0
Label used in the preferences dialog keybindings tab. * May contain underscores - these won't be displayed.
< Optional widget to set an accelerator for, or @c NULL
< Modifier keys, such as @c GDK_CONTROL_MASK or 0
< Key name for the configuration file, such as @c "menu_new"
Represents a single keybinding action. * * Use keybindings_set_item() to set.