public static function json($json, $member = '', $default_key = '')
	{
		return self::option_group(json_decode($json, true), $member, $default_key);
	}
public static function json($json, $member = '', $default_key = '')
	{
		return self::option_group(json_decode($json, true), $member, $default_key);
	}
public static function json ( $ json , $ member = '' , $ default_key = '' ) { return self :: option_group ( json_decode ( $ json , true ) , $ member , $ default_key ) ; }
Takes a JSON object, as a string, to convert to query string keys.

@param string $json (Required) A JSON object. The JSON string should use canonical rules (e.g., double quotes, quoted keys) as is required by PHP's <php:json_encode()> function.
@param string $member (Optional) The name of the "member" property that AWS uses for lists in certain services. Defaults to an empty string.
@param string $default_key (Optional) The default key to use when the value for `$data` is a string. Defaults to an empty string.
@return array The option group parameters to merge into another method's `$opt` parameter.
Takes a JSON object as a string to convert to query string keys .