Bug 203838 [Markers] [Markers] clicking on column headers does not sort table
I20070918 Clicking on any of the column headers does not sort based on the relevant column.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/ExtendedMarkersView.java
/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.ui.progress.WorkbenchJob#shouldRun()
			 */
			public boolean shouldRun() {
				return !builder.isBuilding();
			}
		};
		updateJob.setSystem(true);
		return updateJob;
	}
	/**
	 * Return the object that is the input to the viewer.
	 * 
	 * @return Object
	 */
	Object getViewerInput() {
		return viewer.getInput();
	}
	/**
	 * Get all of the fields visible in the receiver.
	 * 
	 * @return MarkerField[]
	 */
	public MarkerField[] getVisibleFields() {
		return builder.getGenerator().getVisibleFields();
	}
	/*
	 * (non-Javadoc)