For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.

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get callStates$(): Observable<CallStatePayload>

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call.callStates$.subscribe((callStates) => {
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  console.log('callStates:', callStates);
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});