Six silver stars shimmer in the sunlight as they hang above an ice chest overflowing with Jarritos and Jumex. Freshly cut fruit and containers of chamoy sit in trays of ice in front of walls lined with Mexican sweets that tempt children into spoiling their dinners. It’s a small stall, yet it feels like a slice of South Side San Antonio.A sign overhead reads, “Albert’s Mexican Products,” with “Mexican” painted in the colors of the flag. Each of the the silver stars to the left represents one of Albert Núñez’s six children, and beneath, a message reads, “Gracias por su preferencia de parte de la Familia Núñez,” which translates to “Thank you for choosing the Núñez Family.”Núñez greets every customer with a “¡Buenos días!” and…