last test

src/WebView.android.tsx

       webViewStyles.push(styles.hidden);
     }
 
-    if (
-      (source as WebViewUriSource).method === 'POST'
-      && (source as WebViewUriSource).headers
-    ) {
-      console.warn(
-        'WebView: `source.headers` is not supported when using POST.',
-      );
-    } else if (
-      (source as WebViewUriSource).method === 'GET'
-      && (source as WebViewUriSource).body
-    ) {
-      console.warn('WebView: `source.body` is not supported when using GET.');
+    if (source && 'method' in source) {
+      if (source.method === 'POST' && source.headers) {
+        console.warn(
+          'WebView: `source.headers` is not supported when using POST.',
+        );
+      } else if (source.method === 'GET' && source.body) {
+        console.warn('WebView: `source.body` is not supported when using GET.');
+      }
     }
 
     const NativeWebView
 
     const webView = (
       <NativeWebView
-        {...otherProps}
         key="webViewKey"
+        {...otherProps}
         messagingEnabled={typeof onMessage === 'function'}
         onLoadingError={this.onLoadingError}
         onLoadingFinish={this.onLoadingFinish}

src/WebView.ios.tsx

 
     const webView = (
       <NativeWebView
+        key="webViewKey"
         {...otherProps}
         decelerationRate={decelerationRate}
-        key="webViewKey"
         messagingEnabled={typeof onMessage === 'function'}
         onLoadingError={this.onLoadingError}
         onLoadingFinish={this.onLoadingFinish}

src/WebViewTypes.ts

 import { ReactElement, Component } from 'react';
 import {
   NativeSyntheticEvent,
-  ViewStyle,
   ViewProps,
-  StyleProp,
   NativeMethodsMixin,
   Constructor,
   UIManagerStatic,
    * Should caching be enabled. Default is true.
    */
   cacheEnabled?: boolean;
-
-  style?: StyleProp<ViewStyle>;
 }