API Reference > geometry-core > Solid > RuledSweep > mutatePartners mutatePartners MethodStatic Construct a CurveCollection with the same structure as collectionA and collectionB, with primitives constructed by the caller-supplied primitiveMutator function. mutatePartners(collectionA: CurveCollection, collectionB: CurveCollection, primitiveMutator: CurvePrimitiveMutator): undefined | CurveCollection Parameter Type Description collectionA CurveCollection collectionB CurveCollection primitiveMutator CurvePrimitiveMutator Returns - undefined | CurveCollection Returns undefined if there is any type mismatch between the two collections. Defined in solid/RuledSweep.ts Line 157 Last Updated: 11 June, 2024