SchemaBase child = schema.getChild(i);
Object exten = child.getExtension();
if (exten instanceof GlobalExtension && ((ComponentExtension)exten).isRemoved()) {
// remove the definition from schema
schema.detachChild(i);
modified = true;
if (s_logger.isDebugEnabled()) {
s_logger.debug(" Removed definition " + ((INamed)child).getQName());
}