Construct a chain of up to four filters. The filters are set up in the same order as the arguments.
Construct a chain from range of filters
Increment the number of filters past us that we own
Write a portion of a message to this filter.
Start a new message. Must be closed by endMsg() before another message can be started.
Notify that the current message is finished; flush buffers and do end-of-message processing (if any).
Check whether this filter is an attachable filter.
This class represents Filter chains. A Filter chain is an ordered concatenation of Filters, the input to a Chain sequentially passes through all the Filters contained in the Chain.