Function maybeBind

test/fixtures/snapshot/typescript.js:1631–1633

(obj, fn)

    }
    ts.copyProperties = copyProperties;
    function maybeBind(obj, fn) {
        return fn ? fn.bind(obj) : undefined;
    }
    ts.maybeBind = maybeBind;
    function createMultiMap() {
        var map = new ts.Map();