ESContext.php

<?php

class ESContext
{
    /**
     * @Given a conference named :name with :count track(s) was scheduled
     */
    public function aConferenceNamedWithTrack($name, $count)
    {
        $this->dispatchEvent(ConferenceNamedWithTracksWasScheduled($name, $count));
    }
}

LayeredContext.php

<?php

class LayeredContext
{
    /**
     * @Given a conference named :name with :count track(s) was scheduled
     */
    public function aConferenceNamedWithTrack($name, $count)
    {
        $this->conference = Conference::namedWithTracks($name, $count);
    }
}