🎨 Move common logic into a helper function

lib/panel/dock.js

@@ -7,6 +7,17 @@ let React
 let ReactDOM
 let Component
 
+// eslint-disable-next-line no-use-before-define
+function getPaneContainer(item: PanelDock) {
+  const paneContainer = atom.workspace.paneContainerForItem(item)
+  // NOTE: This is an internal API access
+  // It's necessary because there's no Public API for it yet
+  if (paneContainer && typeof paneContainer.state === 'object' && typeof paneContainer.state.size === 'number' && typeof paneContainer.render === 'function') {
+    return paneContainer
+  }
+  return null
+}
+
 class PanelDock {
   element: HTMLElement;
   subscriptions: CompositeDisposable;
@@ -15,10 +26,8 @@ class PanelDock {
     this.element = document.createElement('div')
     this.subscriptions = new CompositeDisposable()
     this.subscriptions.add(atom.config.observe('linter-ui-default.panelHeight', (panelHeight) => {
-      const paneContainer = atom.workspace.paneContainerForItem(this)
-      // NOTE: This is an internal API access
-      // It's necessary because there's no Public API for it yet
-      if (paneContainer && typeof paneContainer.state === 'object' && typeof paneContainer.state.size === 'number' && typeof paneContainer.render === 'function') {
+      const paneContainer = getPaneContainer(this)
+      if (paneContainer) {
         paneContainer.state.size = panelHeight
         paneContainer.render(paneContainer.state)
       }
@@ -53,11 +62,9 @@ class PanelDock {
   }
   dispose() {
     this.subscriptions.dispose()
-    const paneContainer = atom.workspace.paneContainerForItem(this)
+    const paneContainer = getPaneContainer(this)
     if (paneContainer) {
-      if (typeof paneContainer.state === 'object' && typeof paneContainer.state.size === 'number') {
-        atom.config.set('linter-ui-default.panelHeight', paneContainer.state.size)
-      }
+      atom.config.set('linter-ui-default.panelHeight', paneContainer.state.size)
       paneContainer.paneForItem(this).destroyItem(this, true)
     }
   }