The event received is only valid for the duration of the apppend
call and shouldn't outlive the scope of append.
Moreover, as Logger use a class-local buffer, its tracing functions
which use formatting are not re-entrant and should not be called
from here.
Append a message to the output.
The event received is only valid for the duration of the apppend call and shouldn't outlive the scope of append. Moreover, as Logger use a class-local buffer, its tracing functions which use formatting are not re-entrant and should not be called from here.