#evented_write was refactored in #14626 so it no longer needs to keep track of the input slice size in order to make sure it's fully written. Thus the slice parameter is obsolete.
#evented_read and #evented_send didn't even do anything useful with it except for forwarding it to the block (where it was sometimes used as block parameter, but often the original instead).
#evented_writewas refactored in #14626 so it no longer needs to keep track of the input slice size in order to make sure it's fully written. Thus thesliceparameter is obsolete.#evented_readand#evented_senddidn't even do anything useful with it except for forwarding it to the block (where it was sometimes used as block parameter, but often the original instead).