code: public MetaConfig withObjectToString(ObjectToStringPolicy stringPolicy) {
      Ensure.that(stringPolicy != null, "stringPolicy != null");
  
      return new MetaConfigBuilder(this)
        .setObjectToStringPolicy(stringPolicy)
        .build();
    }
docs: Allows consumers to set special handling for {@link Getter#get(Object)} responses for
  {@link Meta#toString(Object)}.
  
  @param stringPolicy a non-null to string policy
  @return the new config
  @see #withShallowArraySupport()