patchType does not survive operations
Functionality to add/problem to solve
Override a bc on a constraint patch type (e.g. cyclicAMI) using the patchType override. Now do any kind of operation. E.g. run laplacianFoam (calculates&writes fvc::grad). This will e.g. write gradTx which will have again type cyclicAMI. We might want the default calculated instead (so preserve the patchType override)
Proposal
Have additional keyword like patchType?