private static String getOperatorText(@NotNull UBinaryExpression binaryExpression) {
    UIdentifier identifier = binaryExpression.getOperatorIdentifier();
    if (identifier == null) return null;
    PsiElement identifierSourcePsi = identifier.getSourcePsi();
    if (identifierSourcePsi == null) return null;
    return identifierSourcePsi.getText();
  }
private static String getOperatorText(@NotNull UBinaryExpression binaryExpression)