Bug 125955 [Field Assist] - StringIndexOutOfBoundsException when backspacing out of a filter
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
}
	/**
	 * Get the label provider that is used to show proposals.
	 * 
	 * @return the {@link ILabelProvider} used to show proposals, or
	 *         <code>null</code> if one has not been installed.
	 */
	public ILabelProvider getLabelProvider() {
		return labelProvider;
	}
	/**
	 * Return a boolean indicating whether the receiver is enabled.
	 * 
	 * @return <code>true</code> if the adapter is enabled, and
	 *         <code>false</code> if it is not.
	 */
	public boolean isEnabled() {
		return isEnabled;
	}
	/**
	 * Set the label provider that is used to show proposals. The lifecycle of
	 * the specified label provider is not managed by this adapter. Clients must
	 * dispose the label provider when it is no longer needed.
	 * 
	 * @param labelProvider
	 *            the (@link ILabelProvider} used to show proposals.
	 */
	public void setLabelProvider(ILabelProvider labelProvider) {
		this.labelProvider = labelProvider;
	}