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Soon after a stop-work order had been lifted on a hotel and condominium project in Brooklyn Bridge Park, a developer got a phone call.

It was Mayor Bill de Blasio, hitting up the developer for a donation to his political nonprofit group, the Campaign for One New York.

The developer, Toll Brothers, donated $25,000 to the mayor’s nonprofit in April 2015, a month after the mayor’s call.

Around the same time, two other developers with business pending before the city, Brookfield Financial Properties and Greenpoint Landing Developers , were also urged by the mayor or his representatives to donate money to his nonprofit. The companies gave $50,000 each.