View Source datastructures.js, line 454 Methods # async add(item, callback) Parameters: Name Type Description item * callback * View Source datastructures.js, line 473 # async contains(item, callback) Parameters: Name Type Description item * callback * View Source datastructures.js, line 500 # async remove(item, callback) Parameters: Name Type Description item * callback * View Source datastructures.js, line 517 # async size(callback) Parameters: Name Type Description callback * View Source datastructures.js, line 560 # async values(callback) Parameters: Name Type Description callback * View Source datastructures.js, line 550