TextMatchableDocument is a MatchableDocument subclass created in the TextOrStage and used to perform covered matching on non-text fields of a compound text index.

Its existence in the TextOrStage makes the TextOrStage a lot more complex than it needs to be.

This logic should be moved to another stage (perhaps the FetchStage could be modified to support this, or a new TextFetchStage can be used instead of the normal FetchStage).

Removing the TextMatchableDocument from the TextOrStage allows for the following simplifications in the TextOrStage:

• Remove the parameters txn, filter, and index from the constructor
• Remove the kInit state, and the initStage method
• Remove the private members _filter, _txn, _idRetrying, _recordCursor, and _index
• Remove the handling of a MatchExpression filter
• Remove all WriteConflictException handling logic (_idRetrying)