@Override
			public void modifyLatest(ProgramDB program) {
				try {
					Namespace ns;
					GhidraClass gc;
					ns = program.getSymbolTable()
							.createNameSpace(program.getGlobalNamespace(),
								"Blue", SourceType.USER_DEFINED);
					assertNotNull(ns);
					ns = program.getSymbolTable()
							.createNameSpace(program.getGlobalNamespace(),
								"Green", SourceType.USER_DEFINED);
					assertNotNull(ns);
					gc = program.getSymbolTable()
							.createClass(program.getGlobalNamespace(), "Red",
								SourceType.USER_DEFINED);
					assertNotNull(gc);
					gc = program.getSymbolTable()
							.createClass(program.getGlobalNamespace(),
								"Yellow", SourceType.USER_DEFINED);
					assertNotNull(gc);
				}
				catch (Exception e) {
					Assert.fail(e.getMessage());
				}

			}
Test the merge of the versioned program's symbols in the listing.
Ghidra/Features/Base/src/test.slow/java/ghidra/app/merge/listing/SymbolMergeManagerNamespace1Test.java