code: function searchFileNames($basePath, $query, $limit = null, $includeDeleted = false)
      {
          Path::checkArg("basePath", $basePath);
          Checker::argStringNonEmpty("query", $query);
          Checker::argNatOrNull("limit", $limit);
          Checker::argBool("includeDeleted", $includeDeleted);
  
          $response = $this->doPost(
              $this->apiHost,
              $this->appendFilePath("1/search", $basePath),
              array(
                  "query" => $query,
                  "file_limit" => $limit,
                  "include_deleted" => $includeDeleted,
              ));
  
          if ($response->statusCode !== 200) throw RequestUtil::unexpectedStatus($response);
  
          return RequestUtil::parseResponseJson($response->body);
      }
docs: Returns metadata for all files and folders whose filename matches the query string.
  
  See <a href="https://www.dropbox.com/developers/core/docs#search">/search</a>.
  
  @param string $basePath
  The path to limit the search to (UTF-8).  Pass in "/" to search everything.
  
  @param string $query
  A space-separated list of substrings to search for.  A file matches only if it contains
  all the substrings.
  
  @param int|null $limit
  The maximum number of results to return.
  
  @param bool $includeDeleted
  Whether to include deleted files in the results.
  
  @return mixed
  A list of <a href="https://www.dropbox.com/developers/core/docs#metadata-details>metadata
  objects</a> of files that match the search query.
  
  @throws Exception