Add a JSDoc for _dataCheck (#7377)

diff --git a/src/core/core.datasetController.js b/src/core/core.datasetController.js
index 0e78872537dcdc9023aab86339f46ca793485cf1..110a6ca354e4667b78e9ca1aa4dd3a03b982f165 100644 (file)
--- a/src/core/core.datasetController.js
+++ b/src/core/core.datasetController.js
@@ -339,6 +339,7 @@ export default class DatasetController {
        }
 
        /**
+        * @return {boolean} whether the data was modified
         * @private
         */
        _dataCheck() {