Suppress superfluous warnings of 'Boolean method is always inverted' (#7930)

Author: srawlins

flutter-idea/src/io/flutter/dart/FlutterDartAnalysisServer.java

@@ -70,6 +70,7 @@ public String getSdkVersion() {
     return getAnalysisService().getSdkVersion();
   }
 
+  /** @noinspection BooleanMethodIsAlwaysInverted*/
   public boolean isServerConnected() {
     return !getSdkVersion().isEmpty();
   }

flutter-idea/src/io/flutter/pub/PubRoot.java

@@ -194,6 +194,7 @@ public String getRelativePath(@NotNull VirtualFile file) {
 
   /**
    * Returns true if the given file is a directory that contains tests.
+   * @noinspection BooleanMethodIsAlwaysInverted
    */
   public boolean hasTests(@NotNull VirtualFile dir) {
     if (!dir.isDirectory()) return false;
@@ -313,6 +314,7 @@ public VirtualFile getPackagesFile() {
   /**
    * Returns true if the packages are up-to-date with regard to the `pubspec.yaml`. The `.packages` file is used if no
    * `.tool/package_config.json` is found.  The default value returned is to return false.
+   * @noinspection BooleanMethodIsAlwaysInverted
    */
   public boolean hasUpToDatePackages() {
     // See context at these URLs for the reason we can't use VirtualFile#getTimeStamp()

flutter-idea/src/io/flutter/run/daemon/FlutterApp.java

@@ -302,6 +302,7 @@ public ObservatoryConnector getConnector() {
     return myConnector;
   }
 
+  /** @noinspection BooleanMethodIsAlwaysInverted*/
   public boolean appSupportsHotReload() {
     // Introspect based on registered services.
     if (myVMServiceManager != null && myVMServiceManager.hasAnyRegisteredServices()) {

flutter-idea/src/io/flutter/sdk/FlutterSdkVersion.java

@@ -131,7 +131,7 @@ public boolean canUseDevToolsMultiEmbed() {
     return supportsVersion(MIN_SUPPORTS_DEVTOOLS_MULTI_EMBED);
   }
 
-  @SuppressWarnings("BooleanMethodIsAlwaysInverted")
+  /** @noinspection BooleanMethodIsAlwaysInverted*/
   public boolean canUseDtd() {
     return supportsVersion(MIN_SUPPORTS_DTD);
   }