for _, funcMap := range t.funcs {
		if funcMap == nil {
			continue
		}
		if funcMap[name] != nil {
			return true
		}
	}
	return false
}

// popVars trims the variable list to the specified length
func (t *Tree) popVars(n int) {
	t.vars = t.vars[:n]
}

// useVar returns a node for a variable reference. It errors if the
// variable is not defined.

The data object generated by `update` method\n * @argument {Object} options - Modifiers configuration and options\n * @returns {dataObject} The data object, properly modified\n */\n\n/**\n * Modifiers are plugins used to alter the behavior of your poppers.<br />\n * Popper.js uses a set of 9 modifiers to provide all the basic functionalities\n * needed by the library.\n *\n * Usually you don't want to override the `order`, `fn` and `onLoad` props.\n * All the other properties are configurations that...