GWT 2.7.0

## Uses of Interface
com.google.gwt.core.client.Callback

Packages that use Callback
com.google.gwt.core.client | Fundamental classes used in client-side GWT code.
com.google.gwt.geolocation.client | Support for the HTML5 Geolocation API.

Uses of Callback in com.google.gwt.core.client

Methods in com.google.gwt.core.client with parameters of type Callback
`void` | `AsyncProvider.get(Callback<? super T,? super F> callback)`
`ScriptInjector.FromUrl` | `ScriptInjector.FromUrl.setCallback(Callback<java.lang.Void,java.lang.Exception> callback)` Specify a callback to be invoked when the script is loaded or loading encounters an error.

Uses of Callback in com.google.gwt.geolocation.client

Methods in com.google.gwt.geolocation.client with parameters of type Callback
`void` | `Geolocation.getCurrentPosition(Callback<Position,PositionError> callback)` Calls the callback with the user's current position.
`void` | `Geolocation.getCurrentPosition(Callback<Position,PositionError> callback, Geolocation.PositionOptions options)` Calls the callback with the user's current position, with additional options.
`int` | `Geolocation.watchPosition(Callback<Position,PositionError> callback)` Repeatedly calls the given callback with the user's position, as it changes.
`int` | `Geolocation.watchPosition(Callback<Position,PositionError> callback, Geolocation.PositionOptions options)` Repeatedly calls the given callback with the user's position, as it changes, with additional options.

GWT 2.7.0