How to display packets with long smb2.time values and the packets they are repsonding to.

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I'm presently troubleshooting slow performance of some smb clients when talking to our network storage. By filtering on smb2.time >= 20s I can find the slow responses but what I'm wondering is,is there a way to add to the filter to also include the packets that these ones are responses to. Of course I can find the original requests manually via the 'response to' link but I'm after a filter that will include all these packets.