[Reference:MuleSoft Composer Connections, Installing Composer in Non-Production Environments:While installing Composer in each environment is technically possible, creating individual connections is more efficient and aligns with best practices., Reference:Composer Setup and Configuration, Using Mocked Data:Mocked data can be useful for initial testing, but connecting to actual non-production environments provides more realistic test scenarios., Reference:Testing with Mock Data, Proxy Setup:Creating a proxy to other environments is complex and unnecessary when Composer supports direct connections., Reference:Proxy Configuration, , ]