@classmethod
def get_abjad_startup_string(class_):
    """
        Gets Abjad startup string.

        ..  container:: example

            >>> abjad_configuration = abjad.AbjadConfiguration()
            >>> abjad_configuration.get_abjad_startup_string()
            'Abjad 3.1 (development)'

        Returns string.
        """
    result = 'Abjad {} ({})'
    result = result.format(class_.get_abjad_version_string(), 'development')
    return result
