Bug 221337 [Markers] MarkerItem has too much API
We are exposing too much as API in MarkerItem. We should only provide getAtttributeValue and the methods that support PATH_ATTRIBUTE and NAME_ATTRIBUTE as they are tricky. Everything else needs to be pushed down to an internal class. We should mention the relevant IMarker constants for those removed.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/MarkerItem.java
* it is not found.
	 * @param attribute
	 * @param defaultValue
	 * @return <code>boolean</code>
	 */
	public boolean getAttributeValue(String attribute, boolean defaultValue) {
		
		return defaultValue;
	}
	/**
	 * Get the value of the attribute in the enclosed marker.
	 * 
	 * @param attribute
	 * @param defaultValue
	 *            the defaultValue if the value is not set
	 * @return int
	 */
	public int getAttributeValue(String attribute, int defaultValue) {
		
		return defaultValue;
	}
	/**
	 * Get the String value of the attribute in the enclosed marker.
	 * 
	 * @param attribute
	 * @param defaultValue
	 *            the defaultValue if the value is not set
	 * @return String
	 */
	public String getAttributeValue(String attribute, String defaultValue) {