adding some basic linting - prepping support for multiple models being loaded in by the app.

lib/tflite/model/configuration.dart

@@ -0,0 +1,16 @@
+import 'package:tflite_flutter/tflite_flutter.dart';
+import 'constants.dart';
+
+class ModelConfiguration{
+  String name;
+  late List<InterpreterOptions> interpreters;
+
+  ModelConfiguration(this.name){
+    interpreters = name.contains('gpu') ? ModelConstants.gpuInterpreterList : ModelConstants.cpuInterpreterList;
+  }
+
+  @override
+  String toString() {
+    return 'ModelConfiguration(name: $name, interpreters: $interpreters)';
+  }
+}

lib/tflite/model/constants.dart

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+import 'package:tflite_flutter/tflite_flutter.dart';
+
+
+class ModelConstants {
+  static final InterpreterOptions _npuConfig = InterpreterOptions()..threads = 8..useNnApiForAndroid = true..useMetalDelegateForIOS = true;
+  static final InterpreterOptions _cpuConfig = InterpreterOptions()..threads = 8;
+  static final List<InterpreterOptions> gpuInterpreterList = [_npuConfig, _cpuConfig];
+  static final List<InterpreterOptions> cpuInterpreterList = [_cpuConfig];
+}
+

lib/tflite/model/outputs/recognition.dart

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+
+/// Represents the recognition output from the model
+class Recognition {
+  /// Index of the result
+  final int _id;
+  /// Label of the result
+  final String _label;
+  /// Confidence [0.0, 1.0]
+  final double _score;
+
+  Recognition(this._id, this._label, this._score);
+
+  int get id => _id;
+  String get label => _label;
+  double get score => _score;
+
+  @override
+  String toString() {
+    return 'Recognition(id: $id, label: $label, score: $score)';
+  }
+}

lib/tflite/model/outputs/stats.dart

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+
+class Stats {
+  int totalTime;
+  int preProcessingTime;
+  int inferenceTime;
+  int postProcessingTime;
+
+  Stats(
+      {this.totalTime = -1,
+      this.preProcessingTime = -1,
+      this.inferenceTime = -1,
+      this.postProcessingTime = -1});
+
+  @override
+  String toString() {
+    return 'Stats{totalPredictTime: $totalTime,  preProcessingTime: $preProcessingTime,  inferenceTime: $inferenceTime, postProcessingTime: $postProcessingTime}';
+  }
+}