Bug 327585 Commands, Handlers, and keybindings should use leaf lookup
bundles/org.eclipse.e4.ui.workbench/src/org/eclipse/e4/ui/workbench/modeling/ExpressionContext.java
*/
	public void setAllowPluginActivation(boolean value) {
		allowActivation = value;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.expressions.IEvaluationContext#getAllowPluginActivation()
	 */
	public boolean getAllowPluginActivation() {
		return allowActivation;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.expressions.IEvaluationContext#getDefaultVariable()
	 */
	public Object getDefaultVariable() {
		return IEvaluationContext.UNDEFINED_VARIABLE;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.expressions.IEvaluationContext#addVariable(java.lang.String,
	 * java.lang.Object)
	 */
	public void addVariable(String name, Object value) {
		eclipseContext.set(name, value);
	}
	/*