This class implements several methods to get a list of all Nav3DAgents located inside a certain area of the scene:
public static Nav3DAgent[] GetAgentsInBounds(Bounds _Bounds) – returns the list of all Nav3DAgents located inside a certain Bounds.
public static Nav3DAgent[] GetAgentsInSphere(Vector3 _Center, float _Radius) – returns a list of all Nav3DAgents located inside a sphere with center at _Center and radius of _Radius.