void (PsiExpression expr, PsiType toType, PsiType fromType, boolean isCovariantPosition, PsiMember member) { final TypeConversionDescriptorBase conversion = myRules.findConversion(fromType, toType, member, expr, isCovariantPosition, this); if (conversion == null) { markFailedConversion(toType, expr); } else { setConversionMapping(expr, conversion); } }