Bug 221521 [Markers] New markers API needs to be pared down
We have too much API in some of the new classes and they can be moved to internals
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/MarkerField.java
public final int getFontWidth(Control control) {
		GC gc = new GC(control.getDisplay());
		int width = gc.getFontMetrics().getAverageCharWidth();
		gc.dispose();
		return width;
	}
	/**
	 * Return the id for the receiver.
	 * 
	 * @return String
	 */
	public String getId() {
		return configurationElement
				.getAttribute(MarkerSupportConstants.ATTRIBUTE_ID);
	}
	/**
	 * Return the value for a marker.
	 * 
	 * @param marker
	 * @return String
	 */
	public String getMarkerValue(IMarker marker) {
		return getValue(MarkerSupportInternalUtilities.newMarkerItem(marker));
	}
	/**
	 * Get the severity of the element.
	 * 
	 * @param element
	 * @return int
	 * @see IMarker#SEVERITY_ERROR