private ArchiveNode getBuiltInNode() {
		ArchiveRootNode archiveRootNode = (ArchiveRootNode) tree.getModelRoot();
		ArchiveNode builtinNode = (ArchiveNode) archiveRootNode.getChild(BUILTIN_NAME);
		assertNotNull(builtinNode);
		return builtinNode;
	}
Tests for managing categories through the data manager plugin and tests for
actions being enabled when a node is selected.
Ghidra/Features/Base/src/test.slow/java/ghidra/app/plugin/core/datamgr/DataTypeManagerPluginTest.java