internal/runtime/ScriptObject.java

895      * @param newProperty property to add
899     public final Property addOwnProperty(final Property newProperty) {
902             final PropertyMap newMap = oldMap.addProperty(newProperty);
905                 final Property oldProperty = oldMap.findProperty(newProperty.getKey());
911                 return newProperty;
972         Property    newProperty;
975             newProperty = new UserAccessorProperty(key, propertyFlags, slot);
976             newMap = oldMap.addProperty(newProperty);
991         Property newProperty;
1005             newProperty = new UserAccessorProperty(uc.getKey(), propertyFlags, slot);
1009             newProperty = newUserAccessors(oldProperty.getKey(), propertyFlags, getter, setter);
1012         return modifyOwnProperty(oldProperty, newProperty);
1031      * @param newProperty   property to replace it with
1035     private Property modifyOwnProperty(final Property oldProperty, final Property newProperty) {
1036         if (oldProperty == newProperty) {
1037             return newProperty; //nop
1040         assert newProperty.getKey().equals(oldProperty.getKey()) : "replacing property with different key";
1045             final PropertyMap newMap = oldMap.replaceProperty(oldProperty, newProperty);
1051                 if (oldPropertyLookup != null && oldPropertyLookup.equals(newProperty)) {
1055                 return newProperty;