Returns a specification to start this module under a supervisor.

See Supervisor.

Callback implementation for ExGram.Handler.handle/2.

Callback implementation for ExGram.Handler.handle_error/1.

Callback invoked to start the supervisor and during hot code upgrades.

Developers typically invoke Supervisor.init/2 at the end of their init callback to return the proper supervision flags.

Callback implementation for Supervisor.init/1.