private List<File> createTwoExternalExtensionsInFolder() throws Exception {
		File externalFolder = createTempDirectory(BUILD_FOLDER_NAME);
		File extension1 = doCreateExternalExtensionInFolder(externalFolder, TEST_EXT_NAME);
		File extension2 = doCreateExternalExtensionInFolder(externalFolder, TEST_EXT_NAME + "Two");
		return List.of(extension1, extension2);
	}
Tests for the {@link ExtensionInstaller} class.
Ghidra/Framework/Project/src/test/java/ghidra/framework/project/extensions/ExtensionInstallerTest.java