def dbStore(self, typ, py_value, context=None):
if py_value is None:<EOL><INDENT>return None<EOL><DEDENT>return self.valueToString(py_value, context=context)<EOL>
Prepares to store this column for the a particular backend database.

:param backend: <orb.Database>
:param py_value: <variant>
:param context: <orb.Context>

:return: <variant>