@classmethod<EOL><INDENT>def normalize_variables(cls, variables):<DEDENT>
<EOL>if variables.get('<STR_LIT:version>', True) in ('<STR_LIT>', False, '<STR_LIT>', None):<EOL><INDENT>del variables['<STR_LIT:version>']<EOL><DEDENT>return super(PackageResource, cls).normalize_variables(variables)<EOL>
Make sure version is treated consistently