The component shift works as follows: components that were located on the right hand side of the inserted column are shifted one column to the right; component column span is increased by one if it intersects the new column.
Column group indices that are greater or equal than the given column index will be increased by one. @param rowIndex index of the row to be inserted @param rowSpec specification of the row to be inserted @throws IndexOutOfBoundsException if the row index is out of range
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