Where does the 'curated_L2' come from?

[XiHuYan]

In the adolescent-mouse/adolescent_L3/Cluster_L3.py, you opened the 'curated_L2' directory as following:

class ClusterL3(luigi.Task):
	"""
	Level 3 clustering of the adolescent dataset
	"""
	target = luigi.Parameter()  # e.g. Hindbrain_Inhibitory
	n_enriched = luigi.Parameter(default=500)  # Number of enriched genes per cluster to use for manifold learning
	
	def requires(self) -> Iterator[luigi.Task]:
		tissues: List[str] = []
		for fname in os.listdir(os.path.join(am.paths().build, "curated_L2")):   # curated_L2, ??????
			if not fname.startswith("L2"):
				continue
			tissue = fname.split("_")[2]

But I can't find any information that describes how 'curated_L2' directory is created. Could you explain how 'curated_L2' is created and what are the files in this directory?