Designing and constructing a building in the middle of a pandemic requires a flexible mind. That’s what Dan Fishbein learned as developers worked on plans for the new building that his company, Sun Life Financial, will move into in two years. A rendering of Sun Life Financial’s planned office building on the Portland waterfront. Courtesy of Sun Life Financial Ground was broken this week – an event that was attended virtually, of course – on a building that will house the growing benefits company and, its developer hopes, extend the Old Port eastward. It is one of the area’s first major commercial buildings to break ground since the pandemic struck.