Fix false negative in avoid_positional_boolean_parameters (#2832)

* Fix false negative in `avoid_positional_boolean_parameters`

* use `checkParams`

Author: asashour

lib/src/rules/avoid_positional_boolean_parameters.dart

@@ -60,6 +60,7 @@ class AvoidPositionalBooleanParameters extends LintRule {
     registry.addConstructorDeclaration(this, visitor);
     registry.addFunctionDeclaration(this, visitor);
     registry.addMethodDeclaration(this, visitor);
+    registry.addGenericFunctionType(this, visitor);
   }
 }
 
@@ -105,6 +106,11 @@ class _Visitor extends SimpleAstVisitor<void> {
     }
   }
 
+  @override
+  void visitGenericFunctionType(GenericFunctionType node) {
+    checkParams(node.parameters.parameters);
+  }
+
   bool _isOverridingMember(Element member) {
     var classElement = member.thisOrAncestorOfType<ClassElement>();
     if (classElement == null) return false;

test_data/rules/avoid_positional_boolean_parameters.dart

@@ -101,3 +101,7 @@ extension Ext on E {
 extension on E {
   void badBadBad([bool value = false]) {} // LINT
 }
+
+typedef J = Function({bool value}); // OK
+
+typedef K = Function(bool value); // LINT