A fledgling Charlotte hybrid bus manufacturer which has done business with the city has a new in-house attorney: Charlotte Mayor Anthony Foxx.Foxx started doing legal work for DesignLine International in March, when Foxx was an attorney with Hunton & Williams. Foxx said the bus maker asked him to become its attorney, and that he has been careful about any conflicts between his public office and private job.Foxx said on Monday that DesignLine hasn't talked with him about lobbying other cities for the manufacturer, and lobbying isn't in his job description.