Add 'resetInteractions' into typed_mock.

pkg/typed_mock/lib/typed_mock.dart

 library typed_mock;
 
 
 _InvocationMatcher _lastMatcher;
 
 /// Enables stubbing methods.
 ///
 /// Use it when you want the mock to return a particular value when a particular
 /// method, getter or setter is called.
 ///
@@ skipping 21 matching lines @@
     // set behavior
     var behavior = new Behavior._(_lastMatcher);
     _lastMatcher._behavior = behavior;
     return behavior;
   } finally {
     // clear to prevent memory leak
     _lastMatcher = null;
   }
 }
 
+
+/// Clears all interactions remembered so far.
+resetInteractions(TypedMock mock) {
+  mock._invocations.clear();
+  mock._verifiedInvocations.clear();
+}
+
+
 /// Verifies certain behavior happened a specified number of times.
 Verifier verify(_ignored) {
   try {
     var mock = _lastMatcher._mock;
     mock._removeLastInvocation();
     // set verifier
     return new Verifier._(mock, _lastMatcher);
   } finally {
     // clear to prevent memory leak
     _lastMatcher = null;
@@ skipping 374 matching lines @@
   const _ArgumentMatcher_anyString();
 
   @override
   bool matches(val) {
     return val is String;
   }
 }
 
 /// Matches any [String] value.
 final anyString = const _ArgumentMatcher_anyString() as dynamic;