Insurance — Automobile — Lessor liability endorsement — Illusory coverage — Putative class action brought by lessees of vehicle alleging that defendants’ vehicle insurance policies containing lessor liability endorsement were illusory because the endorsement only provided coverage for vicarious liability against lessors, and that liability is foreclosed by federal Graves Amendment — Policies were not illusory because they imposed on insurers a duty to defend that extended to all aspects of policy, including endorsement — It does not matter for duty-to-defend purposes that the endorsement may only protect against claims foreclosed by federal law, as insurers have duties to defend regardless of whether lawsuits alleging acts within endorsement’s scope are likely, or even able, to succeed in court