def database_exists?(options)
      rslt = true
      begin
        get_database options
      rescue OrientdbError
        rslt = false
      end
      rslt
    end
def database_exists?(options)
      rslt = true
      begin
        get_database options
      rescue OrientdbError
        rslt = false
      end
      rslt
    end
Checks existence of a given database.
 Client has not to be connected to see databases suitable to connect.