@Override
  @Nullable
  default PyAstExpression getReceiver(@Nullable PyAstCallable resolvedCallee) {
    return isRightOperator(resolvedCallee) ? getRightExpression() : getChainedComparisonAwareLeftExpression();
  }
@Override
  @Nullable
  default PyAstExpression getReceiver(@Nullable PyAstCallable resolvedCallee)