diff --git a/README.md b/README.md
index 0ac7b67..3c3361b 100644
--- a/README.md
+++ b/README.md
@@ -130,7 +130,7 @@ Moreover, `graphql-compose` allows you to pass pre-defined resolvers of other ty
 const restApiResponse = {
   name: 'Anakin Skywalker',
   starships: () =>
-    PeopleTC.getResolver('findByUrlList') // get some standard resolver
+    StarshipTC.getResolver('findByUrlList') // get some standard resolver
       .wrapResolve(next => rp => { // wrap with additional logic
         const starshipsUrls = rp.source.starships;
         rp.args.urls = starshipsUrls; // populate `urls` arg from source
diff --git a/src/ObjectParser.js b/src/ObjectParser.js
index f450427..06e6d70 100644
--- a/src/ObjectParser.js
+++ b/src/ObjectParser.js
@@ -1,8 +1,6 @@
 /* @flow */
 
-import { graphql, TypeComposer, upperFirst, type ComposeFieldConfig } from 'graphql-compose';
-
-const { isOutputType } = graphql;
+import { TypeComposer, upperFirst, type ComposeFieldConfig } from 'graphql-compose';
 
 type GetValueOpts = {
   typeName: string,
@@ -48,22 +46,8 @@ export default class ObjectParser {
     }
 
     if (typeOf === 'function') {
-      return this.getFieldConfigFromFunction(value);
+      return value;
     }
-
     return 'JSON';
   }
-
-  static getFieldConfigFromFunction(value: () => any): ComposeFieldConfig<any, any> {
-    const fc = value();
-
-    if (typeof fc === 'string') return fc;
-    if (isOutputType(fc)) return fc;
-    if (fc instanceof TypeComposer) return fc;
-    if (fc && typeof fc === 'object' && fc.type) return fc;
-
-    throw new Error(
-      'Your type function should return: `string`, `GraphQLOutputType`, `TypeComposer`, `FieldConfig`.'
-    );
-  }
 }
diff --git a/src/__fixtures__/app.js b/src/__fixtures__/app.js
index ee20426..c5acbd2 100644
--- a/src/__fixtures__/app.js
+++ b/src/__fixtures__/app.js
@@ -17,6 +17,6 @@ app.use(
 );
 
 app.listen(PORT, () => {
-  console.log(`App running on port ${PORT}`);
-  console.log(`Open http://localhost:${PORT}/graphql`);
+  console.log(`App running on port ${PORT}`);   //eslint-disable-line
+  console.log(`Open http://localhost:${PORT}/graphql`);  //eslint-disable-line
 });
diff --git a/src/__tests__/ObjectParser-test.js b/src/__tests__/ObjectParser-test.js
index 111d7a5..ef23474 100644
--- a/src/__tests__/ObjectParser-test.js
+++ b/src/__tests__/ObjectParser-test.js
@@ -43,14 +43,13 @@ describe('ObjectParser', () => {
       });
     });
 
-    it('process function', () => {
-      const spy = jest.spyOn(OP, 'getFieldConfigFromFunction');
-      const valueAsFn = () => 'String';
-      OP.getFieldConfig(valueAsFn);
-      expect(spy).toHaveBeenCalledWith(valueAsFn);
+    it('function', () => {
+      const valueAsFn = () => 'abracadabra';
+      const res = OP.getFieldConfig(valueAsFn);
+      expect(res).toBe(valueAsFn);
     });
 
-    it('process object', () => {
+    it('object', () => {
       const spy = jest.spyOn(OP, 'createTC');
       const valueAsObj = { a: 123 };
       OP.getFieldConfig(valueAsObj, {
@@ -61,50 +60,6 @@ describe('ObjectParser', () => {
     });
   });
 
-  describe('getFieldConfigFromFunction()', () => {
-    it('accept type as string', () => {
-      const fn = () => 'Int';
-      expect(OP.getFieldConfigFromFunction(fn)).toEqual('Int');
-    });
-
-    it('accept GraphQLOutputType', () => {
-      const fn = () => graphql.GraphQLBoolean;
-      expect(OP.getFieldConfigFromFunction(fn)).toEqual(graphql.GraphQLBoolean);
-
-      const fn2 = () =>
-        new graphql.GraphQLObjectType({
-          name: 'MyType',
-          fields: () => ({
-            field1: { type: graphql.GraphQLFloat },
-          }),
-        });
-      expect(OP.getFieldConfigFromFunction(fn2)).toBeInstanceOf(graphql.GraphQLObjectType);
-    });
-
-    it('accept TypeComposer', () => {
-      const fn = () =>
-        TypeComposer.create(`
-          type MyOtherType {
-            f1: Int!
-          }
-        `);
-      expect(OP.getFieldConfigFromFunction(fn)).toBeInstanceOf(TypeComposer);
-    });
-
-    it('accept FieldConfig', () => {
-      const fn = () => ({
-        type: 'String',
-        args: { a1: 'Int' },
-        resolve: 123,
-      });
-      expect(OP.getFieldConfigFromFunction(fn)).toEqual({
-        type: 'String',
-        args: { a1: 'Int' },
-        resolve: 123,
-      });
-    });
-  });
-
   describe('createTC()', () => {
     it('return TypeComposer', () => {
       const tc = OP.createTC('MyType', { a: 1 });
diff --git a/src/__tests__/__snapshots__/ObjectParser-test.js.snap b/src/__tests__/__snapshots__/ObjectParser-test.js.snap
index 496aa36..97edfe1 100644
--- a/src/__tests__/__snapshots__/ObjectParser-test.js.snap
+++ b/src/__tests__/__snapshots__/ObjectParser-test.js.snap
@@ -11,6 +11,7 @@ Object {
     "type": "String",
   },
   "created": Object {
+    "_fieldAsThunk": [Function],
     "args": Array [],
     "isDeprecated": false,
     "name": "created",
@@ -47,6 +48,7 @@ Object {
     "type": "String",
   },
   "height": Object {
+    "_fieldAsThunk": [Function],
     "args": Array [],
     "isDeprecated": false,
     "name": "height",
@@ -60,6 +62,7 @@ Object {
     "type": "PeopleType_Homeworld",
   },
   "mass": Object {
+    "_fieldAsThunk": [Function],
     "args": Array [],
     "isDeprecated": false,
     "name": "mass",
@@ -97,6 +100,7 @@ Object {
     "type": "String",
   },
   "population": Object {
+    "_fieldAsThunk": [Function],
     "args": Array [],
     "isDeprecated": false,
     "name": "population",
diff --git a/src/__tests__/composeWithRest-test.js b/src/__tests__/composeWithJson-test.js
similarity index 100%
rename from src/__tests__/composeWithRest-test.js
rename to src/__tests__/composeWithJson-test.js