default void modifyMember(
            AbstractShapeBuilder<?, ?> shapeBuilder,
            MemberShape.Builder memberBuilder,
            Function<ShapeId, Map<ShapeId, Trait>> unclaimedTraits,
            Function<ShapeId, Shape> shapeMap
    ) {}
Modifies locally defined members on the shape.

<p>This method is called once for each locally defined member on the shape.

@param shapeBuilder The builder for the shape being modified.
@param memberBuilder The builder for the locally defined member.
@param unclaimedTraits Function that provides unclaimed traits for a shape.
@param shapeMap A function that returns a shape for a given ID, or null.
smithy-model/src/main/java/software/amazon/smithy/model/loader/ShapeModifier.java