The BrtEndHeaderFooter record specifies the end of an
empty collection of records as defined by the Worksheet part ABNF
(section 2.1.7.62), Chart
Sheet (section 2.1.7.7) part ABNF,
Dialog Sheet (section 2.1.7.20) part
ABNF, and Macro Sheet (section 2.1.7.32) part
ABNF.