public Response andContent(Map<String, Object> content) {
        Objects.requireNonNull(content, Required.CONTENT.toString());
        this.content.putAll(content);

        return this;
    }
public Response andContent ( Map < String , Object > content ) { Objects . requireNonNull ( content , Required . CONTENT . toString ( ) ) ; this . content . putAll ( content ) ; return this ; }
Adds an additional content map to the content rendered in the template.
Already existing values with the same key are overwritten.

@param content The content map to add
@return A response object {@link io.mangoo.routing.Response}