Updates documentation to show a side effect of design decision.
Updates documentation to show a side effect of design decision.

When using serializer context groups in JMS serializer, even if just using the Default group in one place explicitly and leaving it blank in another, they will be treated as different component schemas, even though to the serializer outcome they are the same.

Documenting behavior of decision with side effect.

nelmio/NelmioApiDocBundle,nelmio/NelmioApiDocBundle,nelmio/NelmioApiDocBundle