e property <code>localFn</code> will point to
a function wrapper for the <code>count = count + value</code> expression. Often it&#39;s desirable to
pass data from the isolated scope via an expression to the parent scope, this can be
done by passing a map of local variable names and values into the expression wrapper fn.
For example, if the expression is <code>increment(amount)</code> then we can specify the amount value
by calling the <code>localFn</code> as <code>localFn({amount: 22})</code>.</p>
</li>
</u