def METHOD_NAME(doc, doc_export):
	# strip out default fields from children
	if doc.doctype == "DocType" and doc.migration_hash:
		del doc_export["migration_hash"]
	for df in doc.meta.get_table_fields():
		for d in doc_export.get(df.fieldname):
			for fieldname in frappe.model.default_fields + frappe.model.child_table_fields:
				if fieldname in d:
					del d[fieldname]
	return doc_export