How to use the b2luigi.LocalTarget function in b2luigi

def output(self):
        return b2luigi.LocalTarget(f"results/output_file_{self.some_parameter}.txt")

def output(self):
        yield {"raw_output.root": b2luigi.LocalTarget(_build_data_path(self))}

import b2luigi


class ROOTLocalTarget(b2luigi.LocalTarget):
    def exists(self):
        if not super().exists():
            return False

        path = self.path

        import ROOT
        tfile = ROOT.TFile.Open(path)
        return tfile and len(tfile.GetListOfKeys()) > 0

def output(self):
        yield {"output.root": b2luigi.LocalTarget(_build_data_path(self))}