Kotlin: Fix some alerts

java/ql/consistency-queries/locations.ql

@@ -1,5 +1,6 @@
 import java
 import semmle.code.configfiles.ConfigFiles
+import semmle.code.java.Diagnostics
 
 // Locations should either be :0:0:0:0 locations (UnknownLocation, or
 // a whole file), or all 4 fields should be positive.
@@ -27,7 +28,7 @@ Location unusedLocation() {
   not exists(Top t | t.getLocation() = result) and
   not exists(XMLLocatable x | x.getLocation() = result) and
   not exists(ConfigLocatable c | c.getLocation() = result) and
-  not exists(@diagnostic d | diagnostics(d, _, _, _, _, _, result)) and
+  not exists(Diagnostic d | d.getLocation() = result) and
   not (
     result.getFile().getExtension() = "xml" and
     result.getStartLine() = 0 and

java/ql/lib/semmle/code/java/Expr.qll

@@ -1374,10 +1374,10 @@ class LambdaExpr extends FunctionalExpr, @lambdaexpr {
    * The parameters of the lambda expression are the parameters of this method.
    */
   override Method asMethod() {
-    not isKotlinFunctionN() and
+    not this.isKotlinFunctionN() and
     result = this.getAnonymousClass().getAMethod()
     or
-    isKotlinFunctionN() and
+    this.isKotlinFunctionN() and
     result = this.getAnonymousClass().getAMethod() and
     result.getNumberOfParameters() > 1
   }
@@ -1644,7 +1644,7 @@ class NotInstanceOfExpr extends Expr, @notinstanceofexpr {
   Expr getTypeName() { result.isNthChildOf(this, 1) }
 
   /** Gets the type this `!is` expression checks for. */
-  RefType getCheckedType() { result = getTypeName().getType() }
+  RefType getCheckedType() { result = this.getTypeName().getType() }
 
   /** Gets a printable representation of this expression. */
   override string toString() { result = "... !is ..." }

java/ql/lib/semmle/code/java/Variable.qll

@@ -91,7 +91,7 @@ class Parameter extends Element, @param, LocalScopeVariable {
 
   /** Holds if this formal parameter is a parameter representing the dispatch receiver in an extension method. */
   predicate isExtensionParameter() {
-    getPosition() = 0 and this.getCallable() instanceof ExtensionMethod
+    this.getPosition() = 0 and this.getCallable() instanceof ExtensionMethod
   }
 
   /**