def get_options_expiration(self, **defaults):
        """
        Creates request builder for Options Expiration

        Return the expiration dates of an option contract.

        :returns: request builder instance
        :rtype: OptionsExpirationRequestBuilder
        """
        ctx = Context.from_context(self.ctx)
        ctx.defaults.update(defaults)
        return OptionsExpirationEndpoint(ctx, **ctx.defaults)

        Creates request builder for Options Expiration

        Return the expiration dates of an option contract.

        :returns: request builder instance
        :rtype: OptionsExpirationRequestBuilder
        
src/twelvedata/client.py