Bug 182714 [Contributions] Improve toolbar configurability
bundles/org.eclipse.jface/src/org/eclipse/jface/action/IContributionManagerOverrides.java
public Boolean getEnabled(IContributionItem item);
    /**
     * This is not intended to be called outside of the workbench. This method
     * is intended to be deprecated in 3.1.
     * 
     * TODO deprecate for 3.1 
     * @param item the contribution item for which the accelerator value is determined
     * @return the accelerator
     */
    public Integer getAccelerator(IContributionItem item);
    /**
     * This is not intended to be called outside of the workbench. This method
     * is intended to be deprecated in 3.1.
     * 
     * TODO deprecate for 3.1
     * @param item the contribution item for which the accelerator text is determined
     * @return the text for the accelerator
     */
    public String getAcceleratorText(IContributionItem item);
    /**
     * This is not intended to be called outside of the workbench. This method
     * is intended to be deprecated in 3.1.
     * 
     * TODO deprecate for 3.1
     * @param item the contribution item for which the text is determined
     * @return the text
     */
    public String getText(IContributionItem item);
}