code: func (obj *Doc) GetFileTablesRaw(ctx context.Context, connectionId string, relativePath string, dataFormat interface{}) (json.RawMessage, error) {
  	result := &struct {
  		Tables json.RawMessage	`json:"qTables"`
  	} {}
  	err := obj.rpc(ctx, "GetFileTables", result, ensureEncodable(connectionId), ensureEncodable(relativePath), ensureEncodable(dataFormat))
  	return result.Tables, err 
  }
docs: // Lists the tables for a folder connection.
  // 
  // FileType:
  // 
  // Recognized file formats are:
  // 
  // • CSV for Delimited
  // 
  // • FIX for Fixed Record
  // 
  // • DIF for Data Interchange Format
  // 
  // • EXCELBIFF_ for Microsoft Excel (XLS)
  // 
  // • EXCELOOXML_ for Microsoft Excel (XLSX)
  // 
  // • HTML for HTML
  // 
  // • QVD for QVD file
  // 
  // • XML for XML
  // 
  // • QVX for QVX file
  // 
  // • JSON for JSON format
  // 
  // • KML for KML file
  //
  // Parameters:
  //
  // ◾ connectionId   -   Identifier of the connection.
  //
  // ◾ relativePath   -   Path of the connection file.
  //
  // ◾ dataFormat     -   Type of the file.
  //