1 files changed, 21 insertions, 0 deletions
diff --git a/linker/Linker/TypeDefinitionExtensions.cs b/linker/Linker/TypeDefinitionExtensions.cs
new file mode 100644
index 000000000..f94e340c3
--- /dev/null
+++ b/linker/Linker/TypeDefinitionExtensions.cs
@@ -0,0 +1,21 @@
+using Mono.Cecil;
+
+namespace Mono.Linker {
+	public static class TypeDefinitionExtensions {
+		public static bool HasInterface (this TypeDefinition type, TypeDefinition interfaceType, out InterfaceImplementation implementation)
+		{
+			implementation = null;
+			if (!type.HasInterfaces)
+				return false;
+
+			foreach (var iface in type.Interfaces) {
+				if (iface.InterfaceType.Resolve () == interfaceType) {
+					implementation = iface;
+					return true;
+				}
+			}
+
+			return false;
+		}
+	}
+}
+\ No newline at end of file