Within a small example that I will attach in a minute there is defined an element Title:
<xs:choice minOccurs="0" maxOccurs="unbounded"/>
The generated sourcecode for interface Title within XBTitleDocument (all xmlbeans generated classes were created with XB prefix by way of xsdconfig) does extend from org.apache.xmlbeans.XmlObject and contain nothing else than the static org.apache.xmlbeans.SchemaType member. Especially it does not provide access to the string content of the element.
Though the generated implementation TitleImpl in XBTitleDocumentImpl does provide access as it
-> derives from org.apache.xmlbeans.impl.values.XmlComplexContentImpl
-> deriving from XmlObjectBase
-> granting access to that value by way of method getStringValue()