static @Nullable IElementType getOperandTokenType(@NotNull PsiPolyadicExpression expression,
                                                    @NotNull PsiExpression operand,
                                                    @Nullable IElementType outerTokenType) {
    PsiJavaToken operandToken = expression.getTokenBeforeOperand(operand);
    if (operandToken == null) return outerTokenType;
    IElementType innerTokenType = operandToken.getTokenType();
    if (outerTokenType == null) return innerTokenType;
    if (!isSamePrecedence(innerTokenType, outerTokenType)) return innerTokenType;
    if (isInversion(outerTokenType)) return invert(innerTokenType);
    return innerTokenType;
  }
static @Nullable IElementType getOperandTokenType(@NotNull PsiPolyadicExpression expression,
                                                    @NotNull PsiExpression operand,
                                                    @Nullable IElementType outerTokenType)