Function makeCompositeTypeMapper

test/fixtures/snapshot/typescript.js:63312–63314

(kind, mapper1, mapper2)

            return { kind: 2 /* TypeMapKind.Function */, func: func };
        }
        function makeCompositeTypeMapper(kind, mapper1, mapper2) {
            return { kind: kind, mapper1: mapper1, mapper2: mapper2 };
        }
        function createTypeEraser(sources) {
            return createTypeMapper(sources, /*targets*/ undefined);
        }