ActionGroup.addOnConnectProxy

The ::connect-proxy signal is emitted after connecting a proxy to an action in the group. Note that the proxy may have been connected to a different action before. This is intended for simple customizations for which a custom action class would be too clumsy, e.g. showing tooltips for menuitems in the statusbar. GtkUIManager proxies the signal and provides global notification just before any action is connected to a proxy, which is probably more convenient to use. Since 2.4

class ActionGroup
void
addOnConnectProxy

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