Updated plugins

sources_non_forked/vim-snippets/snippets/dart-flutter.snippets

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+# Snippets for dart in flutter project, to use add the following to your .vimrc
+# `autocmd BufRead,BufNewFile,BufEnter *.dart UltiSnipsAddFiletypes dart-flutter`
+# Flutter stateless widget
+snippet stless
+	class $1 extends StatelessWidget {
+		@override
+		Widget build(BuildContext context) {
+			return Container(
+				$2
+			);
+		}
+	}
+
+# Flutter stateful widget
+snippet stful
+	class $1 extends StatefulWidget {
+		@override
+		_$1State createState() => _$1State();
+	}
+
+	class _$1State extends State<$1> {
+		@override
+		Widget build(BuildContext context) {
+			return Container(
+				$2
+			);
+		}
+	}
+
+# Flutter widget with AnimationController
+snippet stanim
+	class $1 extends StatefulWidget {
+		@override
+		_$1State createState() => _$1State();
+	}
+
+	class _$1State extends State<$1>
+			with SingleTickerProviderStateMixin {
+		AnimationController _controller;
+
+		@override
+		void initState() {
+			super.initState();
+			_controller = AnimationController(vsync: this);
+		}
+
+		@override
+		void dispose() {
+			super.dispose();
+			_controller.dispose();
+		}
+
+		@override
+		Widget build(BuildContext context) {
+			return Container(
+				$2
+			);
+		}
+	}