Blurb::
Pointer to specify a full-space model, from which to construct a lower
dimensional surrogate

Description::
This must point to a model block, identified by \ref model-id_model.
That model will be run to generate gradient data, from which an 
active subspace model will be identified and built.

See \ref topic-block_pointer for details about pointers.

Topics::	block_pointer
Examples::
Theory::
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