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Users can inherit from the simpletrace.Analyzer class and receive callbacks when events of interest occur in a trace file. The method signature is a little magic because the timestamp and pid arguments are optional. Document this. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 20170411095654.18383-1-stefanha@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>