+ * @endcode
+ * The sub_process will take these arrays one at a time and run its own process
+ * for each of them:
+ * @code
+ * process:
+ * filters:
+ * plugin: sub_process
+ * source: filters
+ * process:
+ * id:
+ * plugin: static_map
+ * source:
+ * - module
+ * - delta
+ * map:
+ * filter:
+ * 0: filter_html_escape
+ * 1: filter_autop
+ * 2: filter_url
+ * 3: filter_htmlcorrector
+ * 4: filter_html_escape
+ * php:
+ * 0: php_code
+ * @endcode
+ * The example above means that we take each array element ([0], [1], etc.) from
+ * the source filters field and apply the static_map plugin on it. Let's have a
+ * closer look at the first array at index 0:
+ * @code
+ * Array
+ * (
+ * [module] => filter
+ * [delta] => 2
+ * [weight] => 0
+ * )
+ * @endcode
+ * The static_map process plugin results to value 'filter_url' for this input
+ * based on the 'module' and 'delta' map.
+ *
+ * Example 3.