method ZipDirectoryEntry.prototype.addFileSystemEntryimport { ZipDirectoryEntry } from "https://dotland.deno.dev/x/zipjs@v2.6.79/index.js"; addFileSystemEntry(fileSystemEntry: FileSystemEntry): Promise<ZipEntry>Adds an entry with content provided via a FileSystemEntry instance Adds an entry with content provided via a FileSystemEntry instance ParametersfileSystemEntry: FileSystemEntryThe FileSystemEntry instance. ReturnsPromise<ZipEntry>A promise resolving to a ZipFileEntry or a ZipDirectoryEntry instance.