Bug 30727 exclusion filters: cannot remove [build path]
20030129 create a jproject and a src folder in it add 2 packages to it a.b and c.d exclude c/d/ from the classpath open the java build path dialog, select the source folders expand the tree node select 'Exclusion filter: /c/d/' press 'Remove' seems to be removed, right? wrong. open the dialog again - the filter for /c/d is still there
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/SourceContainerWorkbookPage.java
private final Object[] EMPTY_ARR= new Object[0];
		
		
		public void customButtonPressed(TreeListDialogField field, int index) {
			sourcePageCustomButtonPressed(field, index);
		}
		
		public void selectionChanged(TreeListDialogField field) {
			sourcePageSelectionChanged(field);
		}
		
		public void doubleClicked(TreeListDialogField field) {
			sourcePageDoubleClicked(field);
		}
		public Object[] getChildren(TreeListDialogField field, Object element) {
			if (element instanceof CPListElement) {
				return ((CPListElement) element).getChildren(!fUseFolderOutputs.isSelected());
			}
			return EMPTY_ARR;
		}
		public Object getParent(TreeListDialogField field, Object element) {
			if (element instanceof CPListElementAttribute) {
				return ((CPListElementAttribute) element).getParent();
			}