Type Alias MatrixRTCSessionEventHandlerMap
MatrixRTCSessionEventHandlerMap: { encryption_key_changed: ((key: Uint8Array,
encryptionKeyIndex: number,
participantId: string) => void); join_state_changed: ((isJoined: boolean) => void); memberships_changed: ((oldMemberships: CallMembership[],
newMemberships: CallMembership[]) => void); }