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async
function deprecated
Deprecated: use waitForAsync(), (expected removal in v12)
async(fn: Function): (done: any) => any
    Deprecated use waitForAsync(), (expected removal in v12)
Parameters
fn | 
        Function | 
        
Returns
(done: any) => any
See also
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Licensed under the Creative Commons Attribution License 4.0.
 https://v13.angular.io/api/core/testing/async