Suppose I've got a column chart that is populated with rows dynamically 
upon reception of messages from a server, which makes it impossible to make 
assumptions on the index a specific row is in.
My stupid question is: how can I update the value for a specific row?

In theory I should retrieve the row, get the index and do a setValue(...) 
on it, however the APIs seem to lack a function allowing me to check 
whether a data table contains a specific row and/or getting the index for a 
row dynamically.

Any help is highly appreciated.

Thanks.

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