* doesn't really make sense, it's more like a traverse permission; for example, a user
     * must have 'execute' access to the 'bin' directory in order to execute the 'ls' or 'cd' commands.
     */
    void setExecute(boolean execute);

     * doesn't really make sense, it's more like a traverse permission; for example, a user
     * must have 'execute' access to the 'bin' directory in order to execute the 'ls' or 'cd' commands.
     */
    boolean getExecute();