{{alias}}( path )
    Changes the current working directory.

    If unable to set the current working directory (e.g., due to a non-existent
    path), the function returns an error; otherwise, the function returns
    `null`.

    Parameters
    ----------
    path: string
        Desired working directory.

    Returns
    -------
    err: Error|null
        Error object or null.

    Examples
    --------
    > var err = {{alias}}( '/path/to/current/working/directory' )

    See Also
    --------