How to access a model in a skuid custom component

We want to access a data model in a Skuid custom component(in the builders.js), in a “propertiesRenderer” if we access the model asvar ItemModel = skuid.model.getModel(component.state.attr(“model”)); 
This is not giving the model properties.

How could we access the skuid model properties in a custom component builder?
Is this possible, if not waht are the alternatives?

We are looking for this functionality to populate the fields of a selected model picklist in to a multipicklist field.

Thanks in advance