def __init__(self, num_gts, gt_inds, max_overlaps, labels=None):
    self.num_gts = num_gts
    self.gt_inds = gt_inds
    self.max_overlaps = max_overlaps
    self.labels = labels
    self._extra_properties = {}
def __init__(self, num_gts, gt_inds, max_overlaps, labels=None):
    self.num_gts = num_gts
    self.gt_inds = gt_inds
    self.max_overlaps = max_overlaps
    self.labels = labels
    self._extra_properties = {}