public final AttributeTable appendContainer(String clearname) {
        // return null if clearname already exists
        // FIXME! THIS SHOULD RETURN AN EXCEPTION!
        if (_attr.get(clearname) != null)
            return null;

        AttributeTable at = new AttributeTable(clearname);
        Attribute a = new Attribute(clearname, at);
        _attr.put(clearname, a);
        return at;
    }
public final AttributeTable appendContainer(String clearname) {
        
        
        if (_attr.get(clearname) != null)
            return null;

        AttributeTable at = new AttributeTable(clearname);
        Attribute a = new Attribute(clearname, at);
        _attr.put(clearname, a);
        return at;
    }
public final AttributeTable appendContainer ( String clearname ) { // return null if clearname already exists
 // FIXME! THIS SHOULD RETURN AN EXCEPTION!
 if ( _attr . get ( clearname ) != null ) return null ; AttributeTable at = new AttributeTable ( clearname ) ; Attribute a = new Attribute ( clearname , at ) ; _attr . put ( clearname , a ) ; return at ; }
Create and append an attribute container to the table.
A container is another <code>AttributeTable</code> object.

@param clearname the name of the container to add.
@return A pointer to the new <code>AttributeTable</code> object, or null
if a container by that name already exists.
Create and append an attribute container to the table . A container is another <code > AttributeTable< / code > object .