GetValue
GetValue(propertyName AS String, value AS String/Double/Boolean/Integer/Time) AS Boolean
Gets value of the JSON object matching to the property <propertyName>. Possibility to get value of child property by using a XPath expression (ex: JsonObject.GetValue("/bookstore/book/0/author")).
Returns TRUE if <propertyName> is defined with data in <value>. Returns FALSE if <propertyName> is not defined.