code: @Override
  	public SolrInputDocument convertBeanToSolrInputDocument(Object bean) {
  		if (bean instanceof SolrInputDocument) {
  			return (SolrInputDocument) bean;
  		}
  
  		SolrInputDocument document = new SolrInputDocument();
  		getConverter().write(bean, document);
  		return document;
  	}
docs: /*
  (non-Javadoc)
  @see org.springframework.data.solr.core.SolrOperations#convertBeanToSolrInputDocument(java.lang.Object)