question: create a callable that always returns null . concode_field_sep INonThrowingRunnableWithParameter<PARAMTYPE> m_aRunnable concode_elem_sep DATATYPE m_aResult concode_field_sep DATATYPE call concode_elem_sep String toString
target: AdapterRunnableToCallableWithParameter < Object , PARAMTYPE > function ( @ Nonnull final INonThrowingRunnableWithParameter < PARAMTYPE > arg0 ) { return new AdapterRunnableToCallableWithParameter < Object , PARAMTYPE > ( arg0 ) ; }