Create a new directory with the specified path. If exclusive is true, the returned Future will complete with an error if a directory already exists with the specified path.
Create a new file with the specified path. If exclusive is true, the returned Future will complete with an error if a file already exists at the specified path.
Retrieve an already existing directory entry. The returned future will result in an error if a directory at path does not exist or if the item at path is not a directory.
Retrieve an already existing file entry. The returned future will result in an error if a file at path does not exist or if the item at path is not a file.