@Nonnull
  public static EChange removeConnectionListener (@Nullable final ConnectionListener aConnectionListener)
  {
    if (aConnectionListener == null)
      return EChange.UNCHANGED;

    return s_aRWLock.writeLocked ( () -> s_aConnectionListeners.removeObject (aConnectionListener));
  }
@ Nonnull public static EChange removeConnectionListener ( @ Nullable final ConnectionListener aConnectionListener ) { if ( aConnectionListener == null ) return EChange . UNCHANGED ; return s_aRWLock . writeLocked ( ( ) -> s_aConnectionListeners . removeObject ( aConnectionListener ) ) ; }
Remove an existing mail connection listener.

@param aConnectionListener
The new connection listener to set. May not be <code>null</code>.
@return {@link EChange}
@since 1.1.0