RINCON — While packing up her office recently, Lainie Jenkins left something very important behind -- a very large piece of her heart.Jenkins has retired after spending more than seven years as executive director of Child Advocacy Services of Southeast Georgia Inc. She had been with the organization, commonly known as CASA, since 2010.“I had no idea this cause was going to sink its teeth into me where it was my life — and I’m so appreciative” she said. Jenkins supervised a group of volunteers appointed by judges to watch over and advocate for abused and neglected children, to make sure they don’t get lost in the legal and social service system or languish in inappropriate group or foster homes.