def element_or_none(self, using, value):
try:<EOL><INDENT>return self._execute(Command.FIND_ELEMENT, {<EOL>'<STR_LIT>': using,<EOL>'<STR_LIT:value>': value<EOL>})<EOL><DEDENT>except:<EOL><INDENT>return None<EOL><DEDENT>
Check if an element in the current context.

        Support:
            Android iOS Web(WebView)

        Args:
            using(str): The element location strategy.
            value(str): The value of the location strategy.

        Returns:
            Return Element if the element does exists and return None otherwise.

        Raises:
            WebDriverException.