SolrDocument::merge Merges source to the current SolrDocument &reftitle.description; public boolSolrDocument::merge SolrDocumentsourceDoc booloverwritetrue Merges source to the current SolrDocument. &reftitle.parameters; sourceDoc The source document. overwrite If this is &true; then fields with the same name in the destination document will be overwritten. &reftitle.returnvalues; &return.success;