[['NotEmpty']], RdfLtiPlatformRepository::LTI_PLATFORM_OAUTH2_ACCESS_TOKEN_URL => [['NotEmpty'], ['Url']], RdfLtiPlatformRepository::LTI_PLATFORM_OIDC_URL => [['NotEmpty'], ['Url']], RdfLtiPlatformRepository::LTI_PLATFORM_JWKS_URL => [['NotEmpty'], ['Url']], ]; public function getValidators(string $field = null): array { if ($field !== null) { return self::VALIDATORS[$field]; } return self::VALIDATORS; } }