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frontend/node_modules/antd/es/watermark/context.js

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+import * as React from 'react';
+import useEvent from "rc-util/es/hooks/useEvent";
+function voidFunc() {}
+const WatermarkContext = /*#__PURE__*/React.createContext({
+  add: voidFunc,
+  remove: voidFunc
+});
+export function usePanelRef(panelSelector) {
+  const watermark = React.useContext(WatermarkContext);
+  const panelEleRef = React.useRef(null);
+  const panelRef = useEvent(ele => {
+    if (ele) {
+      const innerContentEle = panelSelector ? ele.querySelector(panelSelector) : ele;
+      if (innerContentEle) {
+        watermark.add(innerContentEle);
+        panelEleRef.current = innerContentEle;
+      }
+    } else {
+      watermark.remove(panelEleRef.current);
+    }
+  });
+  return panelRef;
+}
+export default WatermarkContext;