Pass copy operation for non-variable constraints #1286
Merged
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If the
constraints
field of the model has a more efficient copy_to than adding constraints one by one (e.g. SparseMatrixCSC) then even if it's behind layers of bridges, CachingOptimizer and UniversalFallback, it should be copied (if not bridged), not added one by one.This PR addresses that.
See #1261
Requires #1267