Bug 204843 [Field Assist] - API - should deprecate FILTER_CUMULATIVE in ContentProposalAdapter
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
* @return the {@link IContentProposalProvider} used to show proposals. May
	 *         be <code>null</code>.
	 */
	public IContentProposalProvider getContentProposalProvider() {
		return proposalProvider;
	}
	/**
	 * Set the content proposal provider that is used to show proposals.
	 * 
	 * @param proposalProvider
	 *            the {@link IContentProposalProvider} used to show proposals
	 */
	public void setContentProposalProvider(
			IContentProposalProvider proposalProvider) {
		this.proposalProvider = proposalProvider;
	}
	/**
	 * Return the array of characters on which the popup is autoactivated.
	 * 
	 * @return An array of characters that trigger auto-activation of content
	 *         proposal. If specified, these characters will trigger
	 *         auto-activation of the proposal popup, regardless of whether an
	 *         explicit invocation keyStroke was specified. If this parameter is
	 *         <code>null</code>, then only a specified keyStroke will invoke
	 *         content proposal. If this value is <code>null</code> and the
	 *         keyStroke value is <code>null</code>, then all alphanumeric
	 *         characters will auto-activate content proposal.
	 */
	public char[] getAutoActivationCharacters() {
		if (autoActivateString == null) {