public TrailingHeaders addHeader(CharSequence name, Iterable<Object> values) {
        lastHttpContent.trailingHeaders().add(name, values);
        return this;
    }
public TrailingHeaders addHeader ( CharSequence name , Iterable < Object > values ) { lastHttpContent . trailingHeaders ( ) . add ( name , values ) ; return this ; }
Adds an HTTP trailing header with the passed {@code name} and {@code values} to this request.

@param name Name of the header.
@param values Values for the header.

@return {@code this}.