Checks if a CA certificate exists.

        Args:
            name (str): The name of the CA keypair.

        Examples:
            Check if the CA certificate for "myca" exists:

                exists = cdir.isCaCert('myca')

        Returns:
            bool: True if the certificate is present, False otherwise.

def isCaCert(self, name):
        '''
        Checks if a CA certificate exists.

        Args:
            name (str): The name of the CA keypair.

        Examples:
            Check if the CA certificate for "myca" exists:

                exists = cdir.isCaCert('myca')

        Returns:
            bool: True if the certificate is present, False otherwise.
        '''
        crtpath = self._getPathJoin('cas', '%s.crt' % name)
        return os.path.isfile(crtpath)