ArrayNodeDefinition::prototype() returns a NodeDefinition. However in reality it returns an IntegerNodeDefinition, ArrayNodeDefinition and so on.

This makes the last line of the following code ->max(10) not recognizable by IDEs and with a bit TreeBuilder is can become annoying

$node = new ArrayNodeDefinition('name');
$node
    ->prototype('integer')
    ->max(10);

I propose to provide shorthand methods for the standard node types (variable, scalar, boolean, integer, float, array, enum)

So the previous snippet could be written as

$node = new ArrayNodeDefinition('name');
$node
    ->prototypeInteger()
    ->max(10);

As a result, your IDE will recognize that it returns NumericNodeDefinition and can follow the call.