@Override
	public boolean isValidParent(Namespace parent) {
		// TODO: Not sure what other constraints should be placed on namespace movement
		return super.isValidParent(parent) && SymbolType.NAMESPACE
				.isValidParent(symbolMgr.getProgram(), parent, address, isExternal());
	}
Construct a new namespace symbol
@param mgr the symbol manager.
@param cache symbol object cache
@param record the record for this symbol.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/symbol/NamespaceSymbol.java