Interface for formatting elements of a header value. This is the complement to Org.Apache.Http.Message.IHeaderValueParser. Instances of this interface are expected to be stateless and thread-safe.

All formatting methods accept an optional buffer argument. If a buffer is passed in, the formatted element will be appended and the modified buffer is returned. If no buffer is passed in, a new buffer will be created and filled with the formatted element. In both cases, the caller is allowed to modify the returned buffer.

[Android Documentation]