def writeHeader(self):
        self.file.write('#compdef %s\n\n'
                        '_arguments -s -A "-*" \\\n' % (self.cmdName,))
This is the start of the code that calls _arguments
dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/python/_shellcomp.py/ZshArgumentsGenerator.writeHeader