EchoNewsletterUserLocator:

• return User[]|array mismatch with return UserArray::newFromIDs( $newsletter->getSubscribers() );

NewsletterDeletionUpdate

• $store->deleteNewsletter( $this->newsletter ); missing reason parameter
• getSubscribersFromID return type mismatch

NewsletterTablePager

• IDatabase hint used for $mDB, but no tableName method on iDatabase

SpecialNewsletters

• $filterForm->setSubmitId case mismatch on function

NewsletterEditPage

• createNew should be explicitly defined as a member variable

NewsletterStore

• getDefaultInstance should have return docs
• getSubscribersFromID return type mismatch with docs