Added some missing docs

API.md

@@ -17,6 +17,7 @@ _This reference guide lists all methods exposed by MST. Contributions like lingu
 -   [ComplexType](#complextype-2)
 -   [ComplexType](#complextype-3)
 -   [ComplexType](#complextype-4)
+-   [createActionTrackingMiddleware](#createactiontrackingmiddleware)
 -   [decorate](#decorate)
 -   [destroy](#destroy)
 -   [detach](#detach)
@@ -58,6 +59,7 @@ _This reference guide lists all methods exposed by MST. Contributions like lingu
 -   [Type](#type-6)
 -   [Type](#type-7)
 -   [Type](#type-8)
+-   [typecheck](#typecheck)
 -   [types.array](#typesarray)
 -   [types.boolean](#typesboolean)
 -   [types.compose](#typescompose)
@@ -182,6 +184,22 @@ Returns **T**
 
 ## ComplexType
 
+## createActionTrackingMiddleware
+
+Convenience utility to create action based middleware that supports async processes more easily.
+All hooks are called for both synchronous and asynchronous actions. Except that either `onSuccess` or `onFail` is called
+
+The create middleware tracks the process of an action (assuming it passes the `filter`).
+`onResume` can return any value, which will be passed as second argument to any other hook. This makes it possible to keep state during a process.
+
+See the `atomic` middleware for an example
+
+**Parameters**
+
+-   `hooks`  
+
+Returns **IMiddlewareHandler** 
+
 ## decorate
 
 Binds middleware to a specific action
@@ -260,6 +278,8 @@ Returns **IType<any, any>**
 Returns the environment of the current state tree. For more info on environments,
 see [Dependency injection](https://github.com/mobxjs/mobx-state-tree#dependency-injection)
 
+Returns an empty environment if the tree wasn't initialized with an environment
+
 **Parameters**
 
 -   `target` **IStateTreeNode** 
@@ -573,6 +593,16 @@ Returns **any**
 
 ## Type
 
+## typecheck
+
+Run's the typechecker on the given type.
+Throws if the given value is not according the provided type specification.
+
+**Parameters**
+
+-   `type` **IType<any, any>** 
+-   `value` **any** 
+
 ## types.array
 
 Creates an index based collection type who's children are all of a uniform declared type.

README.md

@@ -766,6 +766,7 @@ See the [full API docs](API.md) for more details.
 | [`applyAction(node, actionDescription)`](API.md#applyaction) | Replays an action on the targeted node |
 | [`applyPatch(node, jsonPatch)`](API.md#applypatch) | Applies a JSON patch, or array of patches, to a node in the tree |
 | [`applySnapshot(node, snapshot)`](API.md#applysnapshot) | Updates a node with the given snapshot |
+| [`createActionTrackingMiddleware`](API.md#createactiontrackingmiddleware) | Utility to make writing middleware that track async actions less cumbersome |
 | [`clone(node, keepEnvironment?: true \| false \| newEnvironment)`](API.md#clone) | Creates a full clone of the given node. By default preserves the same environment |
 | [`decorate(middleware, function)`](API.md#decorate) | Attaches middleware to a specific action (or process) |
 | [`destroy(node)`](API.md#destroy) | Kills `node`, making it unusable. Removes it from any parent in the process |
@@ -794,6 +795,7 @@ See the [full API docs](API.md) for more details.
 | [`recordPatches(node)`](API.md#recordpatches) | Creates a recorder that listens to all patches emitted by the node. Call `.stop()` on the recorder to stop this, and `.replay(target)` to replay the recorded patches on another tree |
 | [`resolve(node, path)`](API.md#resolve) | Resolves a `path` (json path) relatively to the given `node` |
 | [`splitJsonPath(path)`](API.md#splitjsonpath) | Splits and unescapes the given JSON `path` into path parts |
+| [`typecheck(type, value)`](API.md#typecheck) | Typechecks a value against a type. Throws on errors. Use this if you need typechecks even in a production build. |
 | [`tryResolve(node, path)`](API.md#tryresolve) | Like `resolve`, but just returns `null` if resolving fails at any point in the path |
 | [`unprotect(node)`](API.md#unprotect) | Unprotects `node`, making it possible to directly modify any value in the subtree, without actions |
 | [`walk(startNode, (node) => void)`](API.md#walk) | Performs a depth-first walk through a tree |

src/types/type-checker.ts

@@ -92,6 +92,7 @@ export function typecheck(type: IType<any, any>, value: any): void {
 /**
  * Run's the typechecker on the given type.
  * Throws if the given value is not according the provided type specification.
+ * Use this if you need typechecks even in a production build (by default all automatic runtime type checks will be skipped in production builds)
  *
  * @alias typecheck
  * @export