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getTreeFromFlatData set rootKey as null #934

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@yongjiaaaa

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@yongjiaaaa

The function getTreeFromFlatData requires setting rootKey as null for it to work. However, the type of rootKey is set as string | number | undefined, resulting in a type error: Type 'null' is not assignable to type 'string | number | undefined'.ts(2322).

Can someone help to take a look?

code snippet:

 const treeItems = await import("react-sortable-tree").then(treeLib => { return treeLib.getTreeFromFlatData({ flatData, getKey: node => node.id, getParentKey: node => node.parentId, // tslint:disable-next-line:no-null-keyword rootKey: null // The value of the parent key when there is no parent (i.e., at root level) }); 

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