An AnnotationSpecSet is a collection of label definitions. For
example, in image classification tasks, you define a set of possible
labels for images as an AnnotationSpecSet. An AnnotationSpecSet is
immutable upon creation.
Required. The display name for AnnotationSpecSet that you
define when you create it. Maximum of 64 characters.
Required. The array of AnnotationSpecs that you define when
you create the AnnotationSpecSet. These are the possible
labels for the labeling task.