WHEN FRANK VOGEL has chatted with the Los Angeles Lakers ahead of traveling to the NBA’s campus at the ESPN Wide World of Sports Complex in Orlando, Florida, next week, the conversation has mostly been informational. Players want clarity about how restrictive the so-called bubble will be — for instance, under what circumstances, if any, can they leave? The coach is asking his players to treat such matters as they would best practices for any other element of being a professional.