@Override
			public void modifyPrivate(ProgramDB program) throws Exception {
				SymbolTable symtab = program.getSymbolTable();
				Symbol namespaceSymbol = symtab.getNamespaceSymbol("foo", null);
				namespaceSymbol.delete();
				program.getExternalManager().addExternalLibraryName("bar",
					SourceType.USER_DEFINED);
			}
Test the merge of the versioned program's symbols in the listing.
Ghidra/Features/Base/src/test.slow/java/ghidra/app/merge/listing/SymbolMergeManagerNamespace2Test.java