DocId DocIdAtTextPos(BlockArray*, TextPosition) const;
ulong Search(uchar const *, TextPosition, TextPosition *, TextPosition *) const;
ulong Search(uchar const *, TextPosition, TextPosition *, TextPosition *, DocId, DocId) const;
DocId DocIdAtTextPos(BlockArray*, TextPosition) const;
ulong Search(uchar const *, TextPosition, TextPosition *, TextPosition *) const;
ulong Search(uchar const *, TextPosition, TextPosition *, TextPosition *, DocId, DocId) const;