how to get Include.NON_NULL working with Optionals

User.java

package com.hotwire.containers;

import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.fasterxml.jackson.datatype.guava.GuavaModule;
import com.google.common.base.Optional;
import java.io.IOException;
import org.immutables.value.Value;

@JsonIgnoreProperties(ignoreUnknown = true)
@JsonInclude(Include.NON_NULL)
@JsonSerialize(as = ImmutableUser.class)
@JsonDeserialize(as = ImmutableUser.class)
@Value.Immutable
public interface User {
  Optional<Integer> id();
  Optional<String> login();
  Optional<String> name();
  Optional<String> email();
  Optional<String> bio();
  Optional<String> company();

  /*
    <dependency>
      <groupId>com.fasterxml.jackson.datatype</groupId>
      <artifactId>jackson-datatype-guava</artifactId>
      <version>2.5.2</version>
    </dependency>
    
    or
    
    <dependency>
      <groupId>com.fasterxml.jackson.datatype</groupId>
      <artifactId>jackson-datatype-jdk8</artifactId>
      <version>2.5.2</version>
    </dependency>
    
    depending which optional you use: Guava or Java 8
  */
  public static void main(String... args) throws IOException {
    ObjectMapper objectMapper = new ObjectMapper();
    objectMapper.registerModule(new GuavaModule()); // register module for Guava datatypes
    objectMapper.registerModule(new Jdk8Module()); // register module for Jdk8 datatypes

    ImmutableUser user = ImmutableUser.builder().email("test@test.com").build();
    System.out.println(objectMapper.writeValueAsString(user));
    // {"email":"test@test.com"}
  }
}

Do you have any idea why :
The method registerModule(Module) in the type ObjectMapper is not applicable for the arguments (GuavaModule) is showing in my java class