You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: scene.go
    path of file: ./repos/submarine/server/battle/src/battle/scene
    
    the code of the file until where you have to start completion: package scene

import (
	"time"

	"github.com/shiwano/submarine/server/battle/lib/navmesh"
	"github.com/shiwano/submarine/server/battle/lib/navmesh/sight"
)

// Scene represents a battle scene.
type Scene interface {
	Event() *EventEmitter
	Stage() *navmesh.NavMesh
	SightsByTeam() map[navmesh.Lay
    
func NewScene(stageMesh *navmesh.Mesh, lightMap *sight.LightMap) FullScene {
	scn := &scene{
		event:        NewEventEmitter(),
		stage:        navmesh.New(stageMesh),
		sightsByTeam: make(map[navmesh.LayerMask]*sight.Sight),
		container:    newContainer(),
	}
	for _, layer := range TeamLayers {
		scn.sightsByTeam[layer] = sight.New(lightMap)
	}
	scn.event.AddActorCreateEventListener(scn.onActorCreate)
	scn.event.AddActorDestroyEventListener(scn.onActorDestroy)
	return scn
}