Bug 205049 Other plug-ins should be able to define default content generator
Currently only the content generator can define which plug-ins it can be the default for - we need a way for plug-ins to refer back to the marker support for thier own generator.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/api/MarkerFieldFilter.java
/**
	 * Return whether or not marker should be filtered by the receiver.
	 * @param marker
	 * @return boolean <code>true</code> if the marker should be shown.
	 */
	public abstract boolean select(IMarker marker);
	
	/**
	 * Initialise the receiver with the values in the values Map.
	 * @param values
	 * @see FiltersContributionParameters
	 */
	public void initialize(Map values){
		
	}
	
	/**
	 * Populate the working copy with the copy of whatever fields are required.
	 * @param copy
	 */
	public void populateWorkingCopy(MarkerFieldFilter copy){
		copy.field = this.field;
	}
	/**
	 * Set the field for the receiver.
	 * @param markerField
	 */
	public final void setField(MarkerField markerField) {
		field = markerField;