Improve stubs [skip ci]

stubs/src/NamedPropertyHandlerConfiguration.php

@@ -20,10 +20,25 @@ class NamedPropertyHandlerConfiguration
 {
     /**
      * @param callable $getter     The callback to invoke when getting a property.
+     *                             Callback signature is (NameValue $name, PropertyCallbackInfo $args)
+     *                             ReturnValue from $args->GetReturnValue() accepts any value.
+     *
      * @param callable $setter     The callback to invoke when setting a property.
+     *                             Callback signature is (\V8\NameValue $name, \V8\Value $value, PropertyCallbackInfo $args)
+     *                             ReturnValue from $args->GetReturnValue() accepts any value
+     *
      * @param callable $query      The callback to invoke to check if a property is present, and if present, get its attributes.
+     *                             Callback signature is (\V8\NameValue $name, PropertyCallbackInfo $args)
+     *                             ReturnValue from $args->GetReturnValue() accepts integer only
+     *
      * @param callable $deleter    The callback to invoke when deleting a property.
+     *                             Callback signature is (\V8\NameValue $name, PropertyCallbackInfo $args)
+     *                             ReturnValue from $args->GetReturnValue() accepts boolean only
+     *
      * @param callable $enumerator The callback to invoke to enumerate all the named properties of an object.
+     *                             Callback signature is (PropertyCallbackInfo $args).
+     *                             ReturnValue from $args->GetReturnValue() accepts ArrayObject only
+     *
      * @param int      $flags      One of \v8\PropertyHandlerFlags constants
      */
     public function __construct(

stubs/src/PropertyHandlerFlags.php

@@ -16,10 +16,28 @@
 namespace V8;
 
 
+/**
+ * Configuration flags for V8\NamedPropertyHandlerConfiguration or
+ * V8\IndexedPropertyHandlerConfiguration.
+ */
 class PropertyHandlerFlags
 {
+    /**
+     * None.
+     */
     const kNone = 0;
+    /**
+     * See \V8\AccessControl::ALL_CAN_READ (all cross-context reads are allowed).
+     */
     const kAllCanRead = 1;
+    /** Will not call into interceptor for properties on the receiver or prototype
+     * chain, i.e., only call into interceptor for properties that do not exist.
+     * Currently only valid for named interceptors.
+     */
     const kNonMasking = 2;
+    /**
+     * Will not call into interceptor for symbol lookup.  Only meaningful for
+     * named interceptors.
+     */
     const kOnlyInterceptStrings = 4;
 }