public MustacheEngineBuilder addResolver(Resolver resolver) {
        checkArgumentNotNull(resolver);
        checkNotBuilt();
        this.resolvers.add(resolver);
        return this;
    }
public MustacheEngineBuilder addResolver(Resolver resolver) {
        checkArgumentNotNull(resolver);
        checkNotBuilt();
        this.resolvers.add(resolver);
        return this;
    }
public MustacheEngineBuilder addResolver ( Resolver resolver ) { checkArgumentNotNull ( resolver ) ; checkNotBuilt ( ) ; this . resolvers . add ( resolver ) ; return this ; }
Adds a value resolver.

@param resolver
@return self
Adds a value resolver .