Type Alias TreeOp

TreeOp:
    | {
        fractional_index: string;
        parent: TreeID
        | undefined;
        target: TreeID;
        type: "create";
    }
    | {
        fractional_index: string;
        parent: TreeID
        | undefined;
        target: TreeID;
        type: "move";
    }
    | { target: TreeID; type: "delete" }