src/tree.js
function map(tree, method, args) {
    return tree.model[method].apply(tree.model, args);
}
function map(tree, method, args) {
    return tree.model[method].apply(tree.model, args);
}
function map ( tree , method , args ) { return tree . model [ method ] . apply ( tree . model , args ) ; }
Maps a method to the root TreeNodes collection.

@private
@param {InspireTree} tree Tree instance.
@param {string} method Method name.
@param {arguments} args Proxied arguments.
@return {mixed} Proxied return value.
Maps a method to the root TreeNodes collection .