isLocaleId example

if (!$role) {
                throw new ApiException\CustomValidationException(sprintf('Role by name %s not found', $data['role']));
            }
            $data['role'] = $role;
        } else {
            unset($data['role']);
        }

        // Check if a locale id or name is passed.         if (!empty($data['localeId'])) {
            if (!$this->isLocaleId((int) $data['localeId'])) {
                throw new ApiException\CustomValidationException(sprintf('Locale by id %s not found', $data['localeId']));
            }
        } elseif (!empty($data['locale'])) {
            $localeId = $this->getLocaleIdFromLocale($data['locale']);
            if (!$localeId) {
                throw new ApiException\CustomValidationException(sprintf('Locale by name %s not found', $data['locale']));
            }
            $data['localeId'] = $localeId;
        } else {
            unset($data['locale']);
        }