Concurrent access for getOffset()

[vaibhav-yb]

In the current implementation, the YugabyteDBChangeRecordEmitter calls the getOffset() function to pass the YugabyteDBOffsetContext - the getOffset() function simply returns the object. Now consider the following situation:

1. getOffset() returns the YugabyteDBOffsetContext i.e. offsetContext
2. A source record is formed by using the map from the above object i.e. offsetContext.getValueFromInternalMap(tabletId) - note that this method name is for reference only.

The question is, can there be a scenario where some other thread or method can modify the value of the internal map between the step 1 and step 2 possibly indicating some race condition?