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384 B

<?php
interface TestInterface
{
public function test(): TestInterface;
}
class TestClass implements TestInterface
{
public function test(): TestInterface
{
return $this;
}
public function foo()
{
var_dump(__METHOD__);
return $this;
}
}
function main()
{
$test = new TestClass();
$test = $test->test();
$test->foo();
}