item.hasData()

Flash MX 2004.

item.hasData(name)

name A string that specifies the name of the data to check for in the library item.

A Boolean value: true if the specified data exists; false otherwise.

Method; determines whether the library item has the named data.

The following example shows a message in the Output panel if the first item in the library contains data point named myData:

if (fl.getDocumentDOM().library.items[0].hasData("myData")){
    fl.trace("Yep, it's there!");
}