The seeds can be roasted and eaten for their almond-like flavor, or crushed and eaten raw.
Coco-Plums - Eat The Weeds:
More on edible hedges here: http://johnstarnesurbanfarm.blogspot.com/2012/04/edible-hedges-hey-if-we-have-to-water.html
Attractive Cocoplum Provides a Tasty Fruit - Fairchild Tropical Botanic Garden http://buff.ly/2rds3AQ
Cocplum - U.S. Department of Agriculture, Cooperative Extension
Service, University of Florida, IFAS, Florida http://lee.ifas.ufl.edu/Hort/GardenPubsAZ/Cocoplum_Chrysobalanus_icaco.pdf
Coco-Plums - Eat The Weeds http://buff.ly/2rdsV8K
IRC - Natives for Your Neighborhood http://buff.ly/2qIxd4e