@Test
	public void customizerShouldOverrideCoreImports() throws Exception {
		DefaultImportCustomizer customizer = DefaultImportCustomizer.build()
				.addClassImports(org.apache.tinkerpop.gremlin.groovy.jsr223.dsl.credential.__.class)
				.create();
		final GremlinGroovyScriptEngine engine = new GremlinGroovyScriptEngine(customizer);
		engine.eval("__.users();[]");
	}
Test for TINKERPOP-2394 Unable to use __ class of a custom DSL when passing a script even if this class is imported
gremlin-groovy/src/test/java/org/apache/tinkerpop/gremlin/groovy/jsr223/GremlinGroovyScriptEngineTest.java