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$chan.keyReturns the key of a channel |
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| Description |
| Returns the key of the channel identified by <window_id>. If no <window_id> is passed , the current channel key is returned (assuming that the current window is a chnannel at all). If the window is not a channel , a warning is printed and an empty string is returned. If the channel has no key set, an empty string is returned. |