tinymce.full.js
function (selector) {
        selector = selectorCache[selector] = selectorCache[selector] || new Selector(selector);

        return selector.find(this);
      }
function (selector) {
        selector = selectorCache[selector] = selectorCache[selector] || new Selector(selector);

        return selector.find(this);
      }
function ( selector ) { selector = selectorCache [ selector ] = selectorCache [ selector ] || new Selector ( selector ) ; return selector . find ( this ) ; }
Find child controls by selector.

@method find
@param {String} selector Selector CSS pattern to find children by.
@return {tinymce.ui.Collection} Control collection with child controls.
Find child controls by selector .