/// <summary>
 /// Fires when a value is selected via the picker.
 /// </summary>
 /// <param name="field"><p>This field instance</p>
 /// </param>
 /// <param name="value"><p>The value that was selected. The exact type of this value is dependent on
 /// the individual field and picker implementations.</p>
 /// </param>
 /// <param name="eOpts"><p>The options object passed to <see cref="Ext.util.Observable.addListener">Ext.util.Observable.addListener</see>.</p>
 /// </param>
 public void select(Picker field, object value, object eOpts){}
 /// <summary>
 /// Fires when the field's picker is expanded.
 /// </summary>
 /// <param name="field"><p>This field instance</p>
 /// </param>
 /// <param name="eOpts"><p>The options object passed to <see cref="Ext.util.Observable.addListener">Ext.util.Observable.addListener</see>.</p>
 /// </param>
 public void expand(Picker field, object eOpts){}
 /// <summary>
 /// Fires when the field's picker is collapsed.
 /// </summary>
 /// <param name="field"><p>This field instance</p>
 /// </param>
 /// <param name="eOpts"><p>The options object passed to <see cref="Ext.util.Observable.addListener">Ext.util.Observable.addListener</see>.</p>
 /// </param>
 public void collapse(Picker field, object eOpts){}
 /// <summary>
 /// Fires when a value is selected via the picker.
 /// </summary>
 /// <param name="field"><p>This field instance</p>
 /// </param>
 /// <param name="value"><p>The value that was selected. The exact type of this value is dependent on
 /// the individual field and picker implementations.</p>
 /// </param>
 /// <param name="eOpts"><p>The options object passed to <see cref="Ext.util.Observable.addListener">Ext.util.Observable.addListener</see>.</p>
 /// </param>
 public void select(Picker field, object value, object eOpts)
 {
 }
 /// <summary>
 /// Fires when the field's picker is expanded.
 /// </summary>
 /// <param name="field"><p>This field instance</p>
 /// </param>
 /// <param name="eOpts"><p>The options object passed to <see cref="Ext.util.Observable.addListener">Ext.util.Observable.addListener</see>.</p>
 /// </param>
 public void expand(Picker field, object eOpts)
 {
 }
 /// <summary>
 /// Fires when the field's picker is collapsed.
 /// </summary>
 /// <param name="field"><p>This field instance</p>
 /// </param>
 /// <param name="eOpts"><p>The options object passed to <see cref="Ext.util.Observable.addListener">Ext.util.Observable.addListener</see>.</p>
 /// </param>
 public void collapse(Picker field, object eOpts)
 {
 }