- poheader-__construct/
- poheader-__tostring/
- poheader-evaluateplural/
- poheader-getlanguagename/
- poheader-getpluralforms/
- poheader-getprojectname/
- poheader-parsearithmetic/
- poheader-parseheader/
- poheader-parsepluralforms/
- poheader-setfromstring/
- poheader-setlanguagename/
- poheader-setprojectname/
- poheader-tokenizeformula/