collection.xml

<template name="coll" value="class $COLLECTION$ implements \Countable, \IteratorAggregate&#10;{&#10;    private $$$INTERNAL_STORE$;&#10;&#10;    public function __construct($ENCAPSULATED_TYPE$ ... $$$INTERNAL_STORE$) &#10;    { &#10;        $this-&gt;$INTERNAL_STORE$ = $$$INTERNAL_STORE$; &#10;    }&#10;&#10;    public function count(): int &#10;    { &#10;        return count($this-&gt;$INTERNAL_STORE$); &#10;    }&#10;    &#10;    /**&#10;     * @return \Traversable|$ENCAPSULATED_TYPE$[]&#10;     */&#10;    public function getIterator(): \Traversable &#10;    {&#10;        foreach ($this-&gt;$INTERNAL_STORE$ as $$$ITEM_VAR$)&#10;        {&#10;            yield $$$ITEM_VAR$;&#10;        }&#10;    }&#10; }" description="Typed immutable collection" toReformat="true" toShortenFQNames="true">
    <variable name="COLLECTION" expression="" defaultValue="" alwaysStopAt="true" />
    <variable name="INTERNAL_STORE" expression="camelCase(COLLECTION)" defaultValue="" alwaysStopAt="false" />
    <variable name="ENCAPSULATED_TYPE" expression="capitalize(firstWord(spaceSeparated(COLLECTION)))" defaultValue="" alwaysStopAt="true" />
    <variable name="ITEM_VAR" expression="camelCase(ENCAPSULATED_TYPE)" defaultValue="" alwaysStopAt="false" />
    <context>
        <option name="PHP" value="true" />
    </context>
</template>