code: function MultiLineString(multiLineString) {
          crs(multiLineString);
          bbox(multiLineString);
          if (!requiredProperty(multiLineString, 'coordinates', 'array')) {
              positionArray(multiLineString.coordinates, 'Line', 2);
          }
      }
docs: https://tools.ietf.org/html/rfc7946#section-3.1.5