code: func (bh *Header) Get(t Tag) string {
  	switch t {
  	case versionTag:
  		return bh.Version
  	case sortOrderTag:
  		return bh.SortOrder.String()
  	case groupOrderTag:
  		return bh.GroupOrder.String()
  	}
  	for _, tp := range bh.otherTags {
  		if t == tp.tag {
  			return tp.value
  		}
  	}
  	return ""
  }
docs: // Get returns the string representation of the value associated with the
  // given header line tag. If the tag is not present the empty string is returned.