feat: Added typing for AppiumBy types

Author: Brijeshkrishna

appium/webdriver/common/appiumby.py

@@ -12,6 +12,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from typing import Literal
+
 from selenium.webdriver.common.by import By
 
 
@@ -32,3 +34,19 @@ class AppiumBy(By):
     FLUTTER_INTEGRATION_KEY = '-flutter key'
     FLUTTER_INTEGRATION_TEXT = '-flutter text'
     FLUTTER_INTEGRATION_TEXT_CONTAINING = '-flutter text containing'
+
+ByType = Literal[
+    "-ios predicate string",
+    "-ios class chain",
+    "-android uiautomator",
+    "-android viewtag",
+    "-android datamatcher",
+    "-android viewmatcher",
+    "accessibility id",
+    "-image",
+    "-custom",
+    "-flutter semantics label",
+    "-flutter type",
+    "-flutter key",
+    "-flutter text containing",
+]