<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def version_text(self):
 """Return version text and collect if not collected."""

        if self._version_text is None:
            self.chain.connection.log("Collecting version information")
            self._version_text = self.driver.get_version_text()
            if self._version_text:
                self.chain.connection.log("Version info collected")
            else:
                self.chain.connection.log("Version info not collected")

        return self._version_text