public/javascript/libs/select2.js
function() {
            if (this.select) {
                var firstOption = this.select.children().first();
                if (this.opts.placeholderOption !== undefined ) {
                    //Determine the placeholder option based on the specified placeholderOption setting
                    return (this.opts.placeholderOption === "first" && firstOption) ||
                           (typeof this.opts.placeholderOption === "function" && this.opts.placeholderOption(this.select));
                } else if (firstOption.text() === "" && firstOption.val() === "") {
                    //No explicit placeholder option specified, use the first if it's blank
                    return firstOption;
                }
            }
        }
function() {
            if (this.select) {
                var firstOption = this.select.children().first();
                if (this.opts.placeholderOption !== undefined ) {
                    //Determine the placeholder option based on the specified placeholderOption setting
                    return (this.opts.placeholderOption === "first" && firstOption) ||
                           (typeof this.opts.placeholderOption === "function" && this.opts.placeholderOption(this.select));
                } else if (firstOption.text() === "" && firstOption.val() === "") {
                    //No explicit placeholder option specified, use the first if it's blank
                    return firstOption;
                }
            }
        }
abstract