@Extension(optional = true)
public class AquaPluginJobDslExtension extends ContextExtensionPoint {

    @DslExtensionMethod(context = StepContext.class)
    public Object aqua(Runnable closure) {
        AquaContext context = new AquaContext();
        executeInContext(closure, context);

        return new AquaPluginBuilder(
                context.getPacks(),
                context.getRunType(),
                context.getLogLevel().getName(),
                context.getTimeout(),
                context.getUnits().name(),
                context.getDelayPollSec()
        );
    }
}

<dependency>
            <groupId>org.jenkins-ci.plugins</groupId>
            <artifactId>job-dsl</artifactId>
            <version>1.34</version>
            <optional>true</optional>
</dependency>

import javaposse.jobdsl.plugin.ContextExtensionPoint;

Jenkins.instance.refreshExtensions();
println(Jenkins.instance.getExtensionList(ContextExtensionPoint.class))

 <dependency>
            <groupId>org.jenkins-ci.plugins</groupId>
            <artifactId>token-macro</artifactId>
            <version>1.10</version>
            <optional>true</optional>
        </dependency>

@Extension(optional = true)
public class TokenMExt extends DataBoundTokenMacro {
    @Override
    public String evaluate(AbstractBuild<?, ?> abstractBuild, TaskListener taskListener, String s) throws MacroEvaluationException, IOException, InterruptedException {
        return null;
    }

    @Override
    public boolean acceptsMacroName(String s) {
        return false;
    }
}

import org.jenkinsci.plugins.tokenmacro.DataBoundTokenMacro;

println(Jenkins.getInstance().getExtensionList(DataBoundTokenMacro.class))