cal scope property and an expression
passed via the attribute <code>attr</code>. The expression is evaluated in the context of the parent scope.
If no <code>attr</code> name is specified then the attribute name is assumed to be the same as the local
name. Given <code>&lt;my-component my-attr=&quot;parentModel&quot;&gt;</code> and the isolate scope definition <code>scope: {
localModel: &#39;=myAttr&#39; }</code>, the property <code>localModel</code> on the directive&#39;s scope will reflect the
value of <cod