// Given
            when(mockResource.getOwnerUser()).thenReturn(mockSID);
            when(mockResource.getOwnerUser(false)).thenReturn(mockSID);
            when(mockResource.getOwnerGroup()).thenReturn(mockSID);
            when(mockResource.getOwnerGroup(true)).thenReturn(mockSID);

            // When
            SID ownerUser1 = mockResource.getOwnerUser();
            SID ownerUser2 = mockResource.getOwnerUser(false);

     */
    SID getOwnerUser() throws IOException;

    /**
     * Return the owner user SID for this file or directory
     *
     * @param resolve
     *            whether to resolve the user name
     * @return the owner user SID, <code>null</code> if not present
     * @throws IOException if an I/O error occurs
     */
    SID getOwnerUser(boolean resolve) throws IOException;

    /**