class WireTableBuilder

The containing message starts a new buffer_lifetime_ordinal.

There is a separate buffer_lifetime_ordinal for input vs. output.

Re-use of the same value is not allowed. Values must be odd. Values

must only increase (increasing by more than 2 is permitted).

A buffer_lifetime_ordinal lifetime starts at SetInputBufferSettings() or

SetOutputBufferSettings(), and ends at the earlier of

CloseCurrentStream() with release_input_buffers/release_output_buffers

set or SetOutputBufferSettings() with new buffer_lifetime_ordinal in the

case of mid-stream output config change.

This value indicates which version of constraints the client is/was aware

of so far.

For input, this must always be 0 because constraints don't change for

input (settings can change, but there's no settings vs current

constraints synchronization issue on input).

For output, this allows the server to know when the client is

sufficiently caught up before the server will generate any more output.

When there is no active stream, a client is permitted to re-configure

buffers again using the same buffer_constraints_version_ordinal.