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Start the session when running in manualStart mode.
Can be used to force start a new session.
Can safely be called before the SDK has initialized (e.g. before the
plugin registers): the call resolves once the SDK is attached and
started, without throwing.
Optionaloptions: StartOptionsthe session start options.
Stop the session recording.
Can safely be called before the SDK has initialized; before start()
it cancels a pending start instead of throwing.
Add custom session-level properties. These are attached to the current session and are searchable, but do not create timeline Track events.