Added mechanism that allows to use function to generate field values #217
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In my project I needed to bind KoGrid to a more complex json structure. Specifically I needed to access arrays and do some other computation that was not possible using simple string based path expressions.
It's now possible to pass a function as field value generator, like this:
{field: {alias: "to", accessor: function(item) {return item.to[0].address}}, displayName: 'To'}
This also allows for different values to be displayed, based on arbitrary conditions.