Manage issue comments.
$issue = new Bitbucket\API\Repositories\Issues();
$issue->setCredentials(new Http\Message\Authentication\BasicAuth($bb_user, $bb_pass));$issue->comments()->all($accountname, $repo_slug, 4);$issue->comments()->get($accountname, $repo_slug, 4, 2967835);$issue->comments()->create($accountname, $repo_slug, 4, 'dummy comment.');$issue->comments()->update($accountname, $repo_slug, 4, 3454384, "dummy comment [edited]");