export interface FileItem {
    created: string;
    id: string;
    filename: string;
    modified: string;
    parents: Array<string>;
    mime: string;
    shared: boolean;
    size: number;
    type: "file" | "directory";
}
export interface FileTreeNode {
    id: string | null;
    filename: string | null;
    files: Array<FileItem>;
    children: Array<FileTreeNode>;
}
export declare function formulateTree(files: FileItem[]): FileTreeNode;