BSLS_DEPRECATE_ISRETAINED

Expand to an expression evaluating to true in a preprocessor context if deprecations in the specified version M.N of the specified UOR U have been deactivated in this build by defining either the corresponding BB_SILENCE_DEPRECATIONS_<U><M><N> macro or the corresponding BB_SILENCE_DEPRECATIONS_FOR_BUILDING_UOR_<U> macro, and expand to an expression evaluating to false otherwise.