function Deno.mkdirSync
          
mkdirSync(path: string | URL,options?: MkdirOptions,): void 
      Synchronously creates a new directory with the specified path.
Deno.mkdirSync("new_dir"); Deno.mkdirSync("nested/directories", { recursive: true }); Deno.mkdirSync("restricted_access_dir", { mode: 0o700 });
Defaults to throwing error if the directory already exists.
Requires allow-write permission.
optional
options: MkdirOptions
      
    void