add missing src/B.js from template

src/B.js

@@ -0,0 +1,73 @@
+import A from './A';
+import {
+  getType
+}
+from 'model-attributes';
+import {
+  LogLevelMixin
+}
+from 'loglevel-mixin';
+
+import {
+  StateTransitionMixin,
+  defineActionMethods,
+  prepareActions
+}
+from 'statetransition-mixin';
+
+const actions = prepareActions({
+  start: {
+    stopped: {
+      target: 'running',
+      during: 'starting',
+      rejected: 'failed',
+      timeout: 5000
+    }
+  },
+  restart: {
+    stopped: {
+      target: 'running',
+      during: 'starting',
+      rejected: 'failed',
+      timeout: 5000
+    },
+    running: {
+      target: 'running',
+      during: 'restarting',
+      timeout: 5000
+    }
+  },
+  stop: {
+    running: {
+      target: 'stopped',
+      during: 'stopping',
+      rejected: 'failed',
+      timeout: 5000
+    },
+    starting: {
+      target: 'stopped',
+      during: 'stopping',
+      rejected: 'failed',
+      timeout: 5000
+    },
+    failed: {
+      target: 'stopped',
+      during: 'stopping',
+      rejected: 'failed',
+      timeout: 1000
+    }
+  }
+});
+
+export default class B extends StateTransitionMixin(LogLevelMixin(A), actions, 'stopped') {
+  constructor() {
+    super();
+    console.log('constructor B');
+    this.type = getType('string');
+    console.log(`type: ${this.type.name}`);
+    console.log(`logLevel: ${this.logLevel}`);
+    console.log(`state: ${this.state}`);
+  }
+}
+
+defineActionMethods(A.prototype, actions);