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unset()
store.setunset(attribute, undefined)
To delete a store attribute, set it to undefined
If any attribute changes, a change
event is triggered. The easiest way to subscribe to those in the widget is by implementing the onStoreChange method.
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Property Pages
Most widgets require configuration to function correctly. The widget configuration panels are exposed in the API, and can be leveraged and/or extended freely. To define a custom property panel, add a config.js file to the custom widget, and use the widget upload tool to bundle it.
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