Add ExpansionTile.builder ? ExpansionTile Performance Issue #40752
Description
ExpansionTile needs a (.builder constructor) just like listview
if expansion tile have lots of heavy children it causes hard fps drop
[√] Flutter (Channel stable, v1.9.1+hotfix.2, on Microsoft Windows [Version 10.0.17763.678], locale en-US)
• Flutter version 1.9.1+hotfix.2 at C:\flutter
• Framework revision 2d2a1ffec9 (11 days ago), 2019-09-06 18:39:49 -0700
• Engine revision b863200c37
• Dart version 2.5.0
[√] Android toolchain - develop for Android devices (Android SDK version 29.0.0)
• Android SDK at C:\Users\Kirolous.nashaat\AppData\Local\Android\Sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-29, build-tools 29.0.0
• ANDROID_HOME = C:\Users\Kirolous.nashaat\AppData\Local\Android\Sdk
• Java binary at: D:\Sources\android-studio-ide-181.4987877-windows\android-studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
• All Android licenses accepted.
[!] Android Studio (version 3.2)
• Android Studio at D:\Sources\android-studio-ide-181.4987877-windows\android-studio
X Flutter plugin not installed; this adds Flutter specific functionality.
X Dart plugin not installed; this adds Dart specific functionality.
• Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1136-b06)
[√] IntelliJ IDEA Community Edition (version 2019.2)
• IntelliJ at C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2019.1.1
• Flutter plugin version 39.0.5
• Dart plugin version 192.6603.23
[√] Connected device (1 available)
• Android SDK built for x86 64 • emulator-5554 • android-x64 • Android 9 (API 28) (emulator)
! Doctor found issues in 1 category.