ParameterType specifies what kind of input we need for this
parameter.
Values:
DEFAULT (0):
Default input type.
TEXT (1):
The parameter specifies generic text input.
GCS_READ_BUCKET (2):
The parameter specifies a Cloud Storage
Bucket to read from.
GCS_WRITE_BUCKET (3):
The parameter specifies a Cloud Storage
Bucket to write to.
GCS_READ_FILE (4):
The parameter specifies a Cloud Storage file
path to read from.
GCS_WRITE_FILE (5):
The parameter specifies a Cloud Storage file
path to write to.
GCS_READ_FOLDER (6):
The parameter specifies a Cloud Storage
folder path to read from.
GCS_WRITE_FOLDER (7):
The parameter specifies a Cloud Storage
folder to write to.
PUBSUB_TOPIC (8):
The parameter specifies a Pub/Sub Topic.
PUBSUB_SUBSCRIPTION (9):
The parameter specifies a Pub/Sub
Subscription.
