code: function handleSSLProperties (config) {
    const sslFiles = ['sslKey', 'sslCert', 'sslDHParams']
    let key
    let resolvedFilePath
    let filePath
    for (let i = 0; i < sslFiles.length; i++) {
      key = sslFiles[i]
      filePath = config[key]
      if (!filePath) {
        continue
      }
      resolvedFilePath = fileUtils.lookupConfRequirePath(filePath)
      try {
        config[key] = fs.readFileSync(resolvedFilePath, 'utf8')
      } catch (e) {
        throw new Error(`The file path "${resolvedFilePath}" provided by "${key}" does not exist.`)
      }
    }
  }
docs: Load the SSL files
  CLI arguments will be considered.
  
  @param {Object} config deepstream configuration object
  
  @private
  @returns {void}