lib/client-core/src/main/java/org/apache/olingo/client/core/serialization/AtomDeserializer.java [394:421]:
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  private StartElement skipBeforeFirstStartElement(final XMLEventReader reader) throws XMLStreamException {
    StartElement startEvent = null;
    while (reader.hasNext() && startEvent == null) {
      final XMLEvent event = reader.nextEvent();
      if (event.isStartElement()) {
        startEvent = event.asStartElement();
      }
    }
    if (startEvent == null) {
      throw new IllegalArgumentException("Cannot find any XML start element");
    }

    return startEvent;
  }

  private void common(final XMLEventReader reader, final StartElement start,
      final AbstractODataObject object, final String key) throws XMLStreamException {

    boolean foundEndElement = false;
    while (reader.hasNext() && !foundEndElement) {
      final XMLEvent event = reader.nextEvent();

      if (event.isCharacters() && !event.asCharacters().isWhiteSpace()) {
        object.setCommonProperty(key, event.asCharacters().getData());
      }

      if (event.isEndElement() && start.getName().equals(event.asEndElement().getName())) {
        foundEndElement = true;
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lib/server-core/src/main/java/org/apache/olingo/server/core/deserializer/xml/ODataXmlDeserializer.java [298:325]:
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  private StartElement skipBeforeFirstStartElement(final XMLEventReader reader) throws XMLStreamException {
    StartElement startEvent = null;
    while (reader.hasNext() && startEvent == null) {
      final XMLEvent event = reader.nextEvent();
      if (event.isStartElement()) {
        startEvent = event.asStartElement();
      }
    }
    if (startEvent == null) {
      throw new IllegalArgumentException("Cannot find any XML start element");
    }

    return startEvent;
  }

  private void common(final XMLEventReader reader, final StartElement start,
      final AbstractODataObject object, final String key) throws XMLStreamException {

    boolean foundEndElement = false;
    while (reader.hasNext() && !foundEndElement) {
      final XMLEvent event = reader.nextEvent();

      if (event.isCharacters() && !event.asCharacters().isWhiteSpace()) {
        object.setCommonProperty(key, event.asCharacters().getData());
      }

      if (event.isEndElement() && start.getName().equals(event.asEndElement().getName())) {
        foundEndElement = true;
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