class_docstr: Standard points generator for multi-level (Mlvl) feature maps in 2D
  points-based detectors.
  
  Args:
      strides (list[int] | list[tuple[int, int]]): Strides of anchors
          in multiple feature levels in order (w, h).
      offset (float): The offset of points, the value is normalized with
          corresponding stride. Defaults to 0.5.
code: def _meshgrid(self, x, y, row_major=True):
      yy, xx = torch.meshgrid(y, x)
      if row_major:
          # warning .flatten() would cause error in ONNX exporting
          # have to use reshape here
          return xx.reshape(-1), yy.reshape(-1)
  
      else:
          return yy.reshape(-1), xx.reshape(-1)
  
file_path: dinov2/dinov2/eval/segmentation_m2f/core/anchor/point_generator.py
imports: import numpy
  import torch
  from torch.nn.modules.utils import _pair
  from .builder import PRIOR_GENERATORS
label_desc: Use image node_id 4 for calling the MlvlPointGenerator obj's underlying member method code with example usage: obj._meshgrid(x, y, row_major) and returns: xx,  yy, yy,  xx