Here is a list of all documented files with brief descriptions:

[detail level 123]

▼ google
▼ fitness_api
aggregate_bucket.h
aggregate_by.h
aggregate_request.h
aggregate_response.h
application.h
bucket_by_activity.h
bucket_by_session.h
bucket_by_time.h
bucket_by_time_period.h
data_point.h
data_source.h
data_type.h
data_type_field.h
dataset.h
device.h
fitness_api.h
fitness_service.h
list_data_point_changes_response.h
list_data_sources_response.h
list_sessions_response.h
map_value.h
session.h
value.h
value_map_val_entry.h