code: function checkServerType(key, value)
  {
    if(typeof value != 'string')
      throw SyntaxError(key+' param should be a String, not '+typeof value);
  
    if(!value.match('KMS|KCS'))
      throw SyntaxError(key+' param is not one of [KMS|KCS] ('+value+')');
  }
docs: Indicates if the server is a real media server or a proxy
  
  @typedef core/complexTypes.ServerType
  
  @type {(KMS|KCS)}
   
  Checker for {@link module:core/complexTypes.ServerType}
  
  @memberof module:core/complexTypes
  
  @param {external:String} key
  @param {module:core/complexTypes.ServerType} value