The configuration of input data, including data type, location, etc.
Required for text import, as language code must be specified.
Source located in Cloud Storage.
Required. Data type must be specifed when user tries to import
data.
Optional. Metadata about annotations for the input. You must
specify this field if you are using this InputConfig in an [Ev
aluationJob][google.cloud.datalabeling.v1beta1.EvaluationJob]
for a model version that performs classification.
