Snippet, I used in vs-code for dart programming language and flutter

dart.json

{
  // "prefix": "scs": "static const String"
  // "prefix": "bstl": "create BaseStatelessWidget"
  // "prefix": "bstf": "create BaseStatefulWidget"
  // "prefix": "onbloc": "create on Method for bloc"
  // "prefix": "statebloc": "create State class for bloc without props"
  // "prefix": "stateblocprop": "create State class for bloc And props":
  // "prefix": "eventbloc": "create event class for bloc without props"
  // "prefix": "eventblocprop": "create event class for bloc And props":
  // "prefix": "staticbloc": "create event class for bloc And props":
  // "prefix": "text": "create Text Widget with style":
  // "prefix": "t_scaffold": "Basic test scaffolding"
  // "prefix": "aaaTest": "Test following the Arrange-Act-Assert pattern",
  // "prefix": "SizedBoxShrink",
  

  // Place your snippets for dart here. Each snippet is defined under a snippet name and has a prefix, body and
  // description. The prefix is what is used to trigger the snippet and the body will be expanded and inserted. Possible variables are:
  // $1, $2 for tab stops, $0 for the final cursor position, and ${1:label}, ${2:another} for placeholders. Placeholders with the
  // same ids are connected.
  // Example:
  // "Print to console": {
  // 	"prefix": "log",
  // 	"body": [
  // 		"console.log('$1');",
  // 		"$2"
  // 	],
  // 	"description": "Log output to console"
  // }
  "static const String": {
    "prefix": "scs",
    "body": ["static const String $1 = \"$1\";"],
    "description": "Write static const String "
  },
  "create BaseStatelessWidget": {
    "prefix": "bstl",
    "body": [
      "import 'package:flutter/material.dart';",
      "",
      "class $1 extends BaseStatelessWidget {",
      "  const $1({super.key});",
      "",
      "  @override",
      "  Widget baseBuild(BuildContext context) {",
      "    return $2Container();",
      "  }",
      "}"
    ],
    "description": "create BaseStatelessWidget"
  },
  "create BaseStatefulWidget": {
    "prefix": "bstf",
    "body": [
      "import 'package:flutter/material.dart';",
      "",
      "class $1 extends BaseStatefulWidget {",
      "  const $1({super.key});",
      "",
      "  @override",
      "  BaseState<$1> baseCreateState() => _$1State();",
      "}",
      "",
      "class _$1State extends BaseState<$1> {",
      "  @override",
      "  Widget baseBuild(BuildContext context) {",
      " \treturn $2Container();",
      "  }",
      "}"
    ],
    "description": "create BaseStatefulWidget"
  },
  "create on Method for bloc": {
    "prefix": "onbloc",
    "body": [
      "on<$1>(_on$1);",
      "",
      "",
      "FutureOr<void> _on$1(",
      "  $1 event,",
      "  Emitter<$2> emit,",
      ") {",
      "  emit($3);",
      "}",
      ""
    ],
    "description": "create on Method for bloc"
  },
  "create State class for bloc without props": {
    "prefix": "statebloc",
    "body": ["class $1State extends $2 {", "\tconst $1State();", "", "}"],
    "description": "create State class for bloc without props"
  },
  "create State class for bloc And props": {
    "prefix": "stateblocprop",
    "body": [
      "class $1State extends $2 {",
      "\tconst $1State();",
      "",
      "\t@override",
      "\tList<Object> get props => [];",
      "}"
    ],
    "description": "create State class for bloc And props"
  },
  "create event class for bloc without props": {
    "prefix": "eventbloc",
    "body": ["class $event extends $2 {", "\tconst $event();", "", "}"],
    "description": "create event class for bloc without props"
  },
  "create event class for bloc And props": {
    "prefix": "eventblocprop",
    "body": [
      "class $1event extends $2 {",
      "\tconst $1event();",
      "",
      "\t@override",
      "\tList<Object> get props => [];",
      "}"
    ],
    "description": "create event class for bloc And props"
  },
  "create static $1 bloc(BuildContext context)=> context.read<$1>();": {
    "prefix": "staticbloc",
    "body": ["static $1 bloc(BuildContext context) => context.read<$1>();"],
    "description": "create static $1 bloc(BuildContext context)=> context.read<$1>();"
  },
  "create abstract class $1 implements Equatable": {
    "prefix": "ac",
    "body": [
      "import 'package:equatable/equatable.dart';",
      "",
      "abstract class $1 implements Equatable {",
      "\tconst $1();",
      "}"
    ],
    "description": "create abstract class $1 implements Equatable"
  },
  "create Text Widget with style": {
    "prefix": "text",
    "body": [
      "Text(",
      "    $1,",
      "    style: const TextStyle(",
      "        fontSize: $2,",
      "        fontWeight: FontWeight.w$3,",
      "        color: ConstColors.$4),",
      "),"
    ],
    "description": "create Text Widget with style"
  },
  "Basic test scaffolding": {
    "prefix": "t_scaffold",
    "body": [
      "import 'package:flutter_test/flutter_test.dart';",
      "",
      "void main() {",
      "  late ${1:ClassName} sut;",
      "",
      "  setUp(() {",
      "    sut = ${1:ClassName}();",
      "  });",
      "",
      "  group('', () {});",
      "}",
      ""
    ],
    "description": "Basic test scaffolding"
  },
  "Test following the Arrange-Act-Assert pattern": {
    "prefix": "aaaTest",
    "body": ["test(", "  \"$1\",", "  () async {", "    $2", "  },", ");"],
    "description": "Test following the Arrange-Act-Assert pattern"
  },
  "Flutter widget test boilerplate": {
    "prefix": "wTest",
    "body": [
      "testWidgets(",
      "  \"$1\",",
      "  (WidgetTester tester) async {$2},",
      ");"
    ],
    "description": "Flutter widget test boilerplate"
  },
  "const Sized box Shrink": {
    "prefix": "SizedBoxShrink",
    "body": [
      "const SizedBox.shrink();",
    ],
    "description": "const SizedBox.shrink()"
  }
}

Add

• "prefix": "SizedBoxShrink"