Returns the number of bytes currently available for this delivery, which may not be complete yet, that are still
to either be received by the application or sent by the transport.
Note that this value will change as bytes are received/sent, and is in general not equal to the total length of
a delivery, except the point where {@link #isPartial()} returns false and no content has yet been received by the
application or sent by the transport.
@return the number of bytes currently available for the delivery
Returns the number of bytes currently available for this delivery, which may not be complete yet, that are still to either be received by the application or sent by the transport.
Note that this value will change as bytes are received/sent, and is in general not equal to the total length of a delivery, except the point where {@link #isPartial()} returns false and no content has yet been received by the application or sent by the transport.
@return the number of bytes currently available for the delivery
@see Receiver#recv(byte[], int, int) @see Receiver#recv(hunt.proton.codec.WritableBuffer) @see Sender#send(byte[], int, int) @see Sender#send(hunt.proton.codec.ReadableBuffer)