how to mark rows as readonly in extjs4 grid?
how can i lock the rows in editable grid?

Based on one of the parameter of the store i want to configure the grid to show lock symbol against the row and lock those rows to mark them as read only.
how to mark rows as readonly in extjs4 grid?
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how can i lock the rows in editable grid?

Based on one of the parameter of the store i want to configure the grid to show lock symbol against the row and lock those rows to mark them as read only.