# `Appsignal.CheckIn.Heartbeat`
[🔗](https://github.com/appsignal/appsignal-elixir/blob/v2.17.0/lib/appsignal/check_in/heartbeat.ex#L1)

# `child_spec`

Returns a specification to start this module under a supervisor.

See `Supervisor`.

# `heartbeat`

# `start`

# `start_link`

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*Consult [api-reference.md](api-reference.md) for complete listing*