* There are three different places a go:arg can appear: * - A template definition * <div go:template="<template name>" go:arg="<name>[pb]: <type> [= expression]"></div> * - A replaceable definition * <div go:replaceable="<replaceable name>" go:arg="<name>[pb]: <expression>"></div> * - A template call * <div go:call="#<template name>" go:arg="<name>[pb]: <expression>"></div> */.

* Callback processor gives a chance to execute a special processing when * the processing chain reaches its end but before the call stack starts to * go back.