Explain the contents of the PR.

Which problem does the PR fix? (remove this section if you linked an issue above)

// If you added new features, show examples of how to use them here
// (remove this section if not a new feature)

$foo = new Foo();

// Now we can do
$foo->doSomething();

Describe BC breaks/deprecations here. (remove this section if not needed)

• Add documentation page