TypeScript doesn't infer type or readonly from getter

[bigtimebuddy]

Detection of the getter's return type and readonly (no setter) not working.

/** Get the duration of the audio in seconds. */
public get duration(): number
{
    return this._duration;
}

Workaround is to explicitly add the type.

/**
 * Get the duration of the audio in seconds.
 * @type {number}
 * @readonly
 */
public get duration(): number
{
    return this._duration;
}

[ShukantPal]

Got bit by this, will have to fix