refactor(delegateToSchema): organize imports

Also export useful transform application methods.

src/stitching/delegateToSchema.ts

@@ -35,24 +35,23 @@ import {
 } from '../Interfaces';
 
 import {
+  ExpandAbstractTypes,
+  FilterToSchema,
+  AddReplacementFragments,
+  AddMergedTypeFragments,
+  AddTypenameToAbstract,
+  CheckResultAndHandleErrors,
   applyRequestTransforms,
   applyResultTransforms,
-} from '../transforms/transforms';
+} from '../transforms';
 
-import FilterToSchema from '../transforms/FilterToSchema';
-import AddTypenameToAbstract from '../transforms/AddTypenameToAbstract';
-import CheckResultAndHandleErrors from '../transforms/CheckResultAndHandleErrors';
-import mapAsyncIterator from './mapAsyncIterator';
-import ExpandAbstractTypes from '../transforms/ExpandAbstractTypes';
-import AddReplacementFragments from '../transforms/AddReplacementFragments';
+import { serializeInputValue } from '../utils';
 
 import { ApolloLink, execute as executeLink } from 'apollo-link';
 import linkToFetcher from './linkToFetcher';
 import { observableToAsyncIterable } from './observableToAsyncIterable';
-import { AddMergedTypeFragments } from '../transforms';
-
 import { isAsyncIterable } from 'iterall';
-import { serializeInputValue } from '../utils';
+import mapAsyncIterator from './mapAsyncIterator';
 
 function getDelegatingOperation(
   parentType: GraphQLObjectType,

src/transforms/index.ts

@@ -1,5 +1,9 @@
-import { Transform } from './transforms';
-export { Transform };
+export {
+  Transform,
+  applySchemaTransforms,
+  applyRequestTransforms,
+  applyResultTransforms,
+} from './transforms';
 
 export { default as filterSchema } from './filterSchema';
 export { default as transformSchema, wrapSchema } from './transformSchema';