So far only Devon whenever that HOA gets flipped into a SPA. But we also have a SPA with Vitol and currently no officially signed gas source. I would have to say the chances are definitely not 0% that Vitol has already mentioned Delfin Midstream to Chesapeake.
And I would assume a cargo of LNG is the same as any other regardless of the gas source. Delfin is probably responsible for sourcing their gas but I'm sure they are not opposed to working with a contract partner to secure the raw gas that they'll then sell to that partner.