/**
 * Represents an object that carry  GeoBox extents like interface.
  export interface GeoBoxExtentLike { /**
     * Latitude span in degrees.
     */ readonly latitudeSpan : number ; /**
     * Longitude span in degrees
     */ readonly longitudeSpan : number ; } /**
 * Type guard to assert that `object` conforms to  GeoBoxExtentLike interface.
  export function isGeoBoxExtentLike ( obj ) { return ( obj && typeof obj === "object" && typeof obj . latitudeSpan === "number" && typeof obj . longitudeSpan === "number" ) ; }