code: @Override
  	public String getQualifiedName(char innerClassDelimiter) {
  		if (references != null && !references.isEmpty()) {
  			StringBuilder result = new StringBuilder();
  			for(JvmTypeReference reference: references) {
  				if (result.length() > 0) {
  					result.append(getDelimiter());
  				}
  				result.append(reference.getQualifiedName(innerClassDelimiter));
  			}
  			return result.toString();
  		}
  		return super.getIdentifier();
  	}
docs: The qualified name of a {@link org.eclipse.xtext.common.types.JvmMultiTypeReference JvmMultiTypeReference}
  is the concatenated qualified name of its {@link #getReferences() components}. The delimiter is the <code>&amp;</code>.