Add UnityAssetUtility and UnityRectUtility

Utilities/UnityAssetUtility.cs

@@ -0,0 +1,29 @@
+#if UNITY_EDITOR
+using System;
+using UnityEditor;
+using Object = UnityEngine.Object;
+
+namespace Exanite.Core.Utilities
+{
+    public static class UnityAssetUtility
+    {
+        /// <summary>
+        /// Returns the override importer of an asset. Returns null when the provided
+        /// <see cref="Object"/> is not an asset or does not have an override importer.
+        /// </summary>
+        /// <remarks>
+        /// This is a wrapper around <see cref="AssetDatabase.GetImporterOverride"/> to make it easier to use.
+        /// </remarks>
+        public static Type GetOverrideImporter(this Object asset)
+        {
+            var path = AssetDatabase.GetAssetPath(asset);
+            if (string.IsNullOrEmpty(path))
+            {
+                return null;
+            }
+
+            return AssetDatabase.GetImporterOverride(path);
+        }
+    }
+}
+#endif

Utilities/UnityRectUtility.cs

@@ -0,0 +1,20 @@
+#if UNITY_2021_3_OR_NEWER
+using UnityEngine;
+
+namespace Exanite.Core.Utilities
+{
+    public static class UnityRectUtility
+    {
+        public static Rect WithInset(this Rect rect, float inset)
+        {
+            rect.xMin += inset;
+            rect.yMin += inset;
+
+            rect.xMax -= inset;
+            rect.yMax -= inset;
+
+            return rect;
+        }
+    }
+}
+#endif