Two things to always consider:

1. Consider which leaves your code most responsive to change

2. Consider which is easier to read

1 might argue for current if the flag value might ever be something other than null, I don't see that happening myself.

2 argues for null because it says flat out: if you're here, you're returning null. Even makes life in the debugger easier.

On balance, I'll take return null here.

Two things to always consider:

1. Consider which leaves your code most responsive to change

2. Consider which is easier to read

1 might argue for current if the flag value might ever be something other than null, I don't see that happening myself.

2 argues for null because it says flat out: if you're here, you're returning null. Even makes life in the debugger easier.

On balance, I'll take return null here.

_{The views presented here should in no way be construed as an endorsement of null.}