in src/pre_human_task_lambda.py [0:0]
def textract_block_to_block_relationship(tr):
"""Return a block relationship object from a Textract block object."""
ids = []
if tr:
for r in tr:
if r['Type'] != 'CHILD':
continue
ids.extend(r['Ids'])
break
return Relationship(ids, 'CHILD')