beginAsyncSection
Writes a trace message to indicate that a given section of code has begun. Must be followed by a call to .endAsyncSection using the same tag. Unlike .beginSection and .endSection, asynchronous events do not need to be nested. The name and cookie used to begin an event must be used to end it.
Depending on provided Systracer instance, this method could vary in behavior and in DefaultComponentsSystrace it is a no-op.