in step3/src/loadgen/loadgen.py [0:0]
def field_name_modifier(_, __, event_dict):
"""Replace log level field name 'level' with 'serverity' to meet
Cloud Logging's data model.
Make sure to call this processor after structlog.stdlib.add_log_level.
https://cloud.google.com/logging/docs/reference/v2/rpc/google.logging.v2?hl=en#google.logging.v2.LogEntry
"""
event_dict["severity"] = event_dict["level"]
del event_dict["level"]
return event_dict