Gimp.env_init

function env_init(plug_in: Boolean): void {
    // Gjs wrapper for gimp_env_init()
}
  

You don't need to care about this function. It is being called for you automatically (by means of the MAIN() macro that every plug-in runs). Calling it again will cause a fatal error.

Since 2.4

plug_in

must be true if this function is called from a plug-in