function get() {
	/* eslint-disable no-invalid-this */
	var self = this;
	if ( isNumber( this._size ) ) {
		return size;
	}
	return this._size;

	/**
	* Returns the size.
	*
	* @private
	* @returns {number} size
	*/
	function size() {
		return self._size; // eslint-disable-line no-underscore-dangle
	}
}
Returns a function to get a symbol's size.

@private
@returns {Function} size accessor