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## com.google.gwt.event.logical.shared
Interface HasOpenHandlers<T>

Type Parameters:
  `T` - the type being opened

All Superinterfaces:
  HasHandlers

All Known Implementing Classes:
  DisclosurePanel, Tree

    public interface HasOpenHandlers<T>

extends HasHandlers

A widget that implements this interface is a public source of `OpenEvent` events.

Method Summary
`HandlerRegistration` | `addOpenHandler(OpenHandler<T> handler)` Adds a `OpenEvent` handler.

Methods inherited from interface com.google.gwt.event.shared.HasHandlers
`fireEvent`

Method Detail

### addOpenHandler

    HandlerRegistration addOpenHandler(OpenHandler<T> handler)

  Adds a `OpenEvent` handler.

  Parameters:
    `handler` - the handler
  Returns:
    the registration for the event

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