Gets an example of feature values for the default model signature.

When a model is trained without having tensor examples (e.g. the model is build manually or converted from the Yggdrasil format), the output of this function is used to instantiate the tf graph of the model. The feature value should represent 2 or more examples.

Follow "InputModelSignatureFn".

feature_name Name of the feature.
dataspec_column Yggdrasil column dataspec for the feature.

An example of tensor value.