
Previously, border with '0' was ambiguous. Sometimes we treated it as hairline borders, sometimes as "don't show the border", though even in the latter case we did some graphics work sometimes. Now we have an explicit BorderStyle.none flag to not draw the border efficiently.
Flutter Material Gallery
Demo app for the Material Design widgets implemented in Flutter.
Icon
Icon was generated using Android Asset Studio: https://romannurik.github.io/AndroidAssetStudio/icons-launcher.html#foreground.type=image&foreground.space.trim=0&foreground.space.pad=0.1&foreColor=607d8b%2C0&crop=0&backgroundShape=square&backColor=ffffff%2C100&effects=none
From the Flutter Logo: https://github.com/flutter/website/blob/master/_includes/logo.html which appears to be CC-BY 4.0.