code: public List<String> getHeaders(String name) {
  		Map<String, List<String>> fields = conn.getHeaderFields();
  		if (fields == null) {
  			return null;
  		}
  		return fields.get(name);
  	}
docs: Gets the values of a named response header field
  @param name the header field's name
  @return the header's values or null if there is no such header field