Custom properties and event handlers

[JoshClose]

The documentation shows to set custom properties and event handlers using outerElementType. Is there any reason why it can't/shouldn't be attached to the item?

<VariableSizeGrid {...otherProps}>
    {props => <Cell {...props} onClick={handleClick} />}
</VariableSizeGrid>

[jasontlouro]

Thank you for this, this is a far better approach and should be in the docs.