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PropertyList Object An object that provides access to all of the Custom Properties contained within an item in the Composition. Contained in the "propertyList" property of objects that represent items in the Composition. PropertyList Properties All of the PropertyList properties are read-only. `name (string)` Always null. `parent (object)` The object whose properties are being accessed. `propertyNames (array of strings)` An array of all of the Custom Property names in the item. Can be null if the item has no Custom Properties. `type (string)` The string "PropertyList". `children (array of objects)` Always null.
PropertyList Methods getChild Method Always returns null.	`object getChild(string childName)`
createProperty Creates a new Custom Property within the item, with the specified name.	`void createProperty(string newPropertyName)`
getPropertyValue Returns the current value of the specified Custom Property. Can return null.	`var getPropertyValue(string propertyName)`
setPropertyValue Sets a new value into the specified Custom Property. The value can be set to null.	`void setPropertyValue(string propertyName, var newValue)`

PropertyList Object