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require_graph_variant

problemreductions::registry::problem_ref

Function require_graph_variant 

Source 
pub fn require_graph_variant(
    graph: &ReductionGraph,
    problem_ref: &ProblemRef,
) -> Result<ProblemRef, String>
Expand description

Check whether a catalog-validated ProblemRef exists in the reduction graph.

Returns the export DTO if the variant is reachable, or an error describing which graph variants exist for the problem.