src/Retry/ConfigurationProvider.php [135:166]:
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        };
    }

    /**
     * Config provider that creates config using a config file whose location
     * is specified by an environment variable 'AWS_CONFIG_FILE', defaulting to
     * ~/.aws/config if not specified
     *
     * @param string|null $profile  Profile to use. If not specified will use
     *                              the "default" profile.
     * @param string|null $filename If provided, uses a custom filename rather
     *                              than looking in the default directory.
     *
     * @return callable
     */
    public static function ini(
        $profile = null,
        $filename = null
    ) {
        $filename = $filename ?: (self::getDefaultConfigFilename());
        $profile = $profile ?: (getenv(self::ENV_PROFILE) ?: 'default');

        return function () use ($profile, $filename) {
            if (!@is_readable($filename)) {
                return self::reject("Cannot read configuration from $filename");
            }
            $data = \Aws\parse_ini_file($filename, true);
            if ($data === false) {
                return self::reject("Invalid config file: $filename");
            }
            if (!isset($data[$profile])) {
                return self::reject("'$profile' not found in config file");
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src/S3/RegionalEndpoint/ConfigurationProvider.php [108:139]:
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        };
    }

    /**
     * Config provider that creates config using a config file whose location
     * is specified by an environment variable 'AWS_CONFIG_FILE', defaulting to
     * ~/.aws/config if not specified
     *
     * @param string|null $profile  Profile to use. If not specified will use
     *                              the "default" profile.
     * @param string|null $filename If provided, uses a custom filename rather
     *                              than looking in the default directory.
     *
     * @return callable
     */
    public static function ini(
        $profile = null,
        $filename = null
    ) {
        $filename = $filename ?: (self::getDefaultConfigFilename());
        $profile = $profile ?: (getenv(self::ENV_PROFILE) ?: 'default');

        return function () use ($profile, $filename) {
            if (!@is_readable($filename)) {
                return self::reject("Cannot read configuration from $filename");
            }
            $data = \Aws\parse_ini_file($filename, true);
            if ($data === false) {
                return self::reject("Invalid config file: $filename");
            }
            if (!isset($data[$profile])) {
                return self::reject("'$profile' not found in config file");
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