CasViewerEclipsePlugin/uimaj-ep-casviewer-core/src/main/java/org/apache/uima/casviewer/ui/internal/style/ColoredTypeTreeContentProvider.java [224:251]:
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        } else if (parent instanceof TypeTree) {
            Object[] objs = new Object[1];
            objs[0] = ((TypeTree)parent).getRoot ();
            return objs;
            
        } else {
            Trace.err("Unknow parent: " + parent.getClass().getName());
	    }
	    
        return EMPTY_ARRAY;
    } // getChildren

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
     */
    public Object getParent(Object element) 
    {
        // Trace.trace();
        if (element instanceof TypeNode) {
            return ((TypeNode)element).getParent();
        }
        return null;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
     */
    public boolean hasChildren(Object element) 
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CasViewerEclipsePlugin/uimaj-ep-casviewer-core/src/main/java/org/apache/uima/casviewer/ui/internal/type/TypesTreeContentProvider.java [191:219]:
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        } else if (parent instanceof TypeTree) {
            Object[] objs = new Object[1];
            objs[0] = ((TypeTree)parent).getRoot ();
            return objs;
            
        } else {
            Trace.err("Unknow parent: " + parent.getClass().getName());
	    }
	    
        return EMPTY_ARRAY;
    } // getChildren

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
     */
    public Object getParent(Object element) 
    {
        if (element instanceof TypeNode) {
            return ((TypeNode)element).getParent();
//        } else if (element instanceof TreeFeatureNode) {
//            return ((TreeFeatureNode)element).getParent();
        }
        return null;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
     */
    public boolean hasChildren(Object element) 
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