is there an example of using jqgrid's getChangedCells method to determine if data has changed?

I grepped getChangedCells in the downloadable demos for jqgrid, and could only find the function definition, not example usages of getChangedCells.

What I want to do is save the edits that a user's made if the user clicks on another row. But, I only want to submit the save if the row is dirty.

Thanks in advance, --Nate

jqgrid inline-editing
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