I am afraid that there is no feasible work around that we can recommend you to gather all the changes from all the levels of the hierarchy and send them to the server in a single request.
Basically each of these grids have its own dataSource transport which they use to synchronize the changes with the server. So I would suggest you to just turn the AutoSync
option to true for these Grids and thus the changes will be immediately send to the server after changing the values on the client.
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