code: def space_left_in_page(self):
      # We don't have a page allocated yet
      if self.my_page < 0:
          return 0
      return self.page_size - self.page_offset
  
file_path: ffcv/ffcv/memory_allocator.py
imports: import numpy
  from time import sleep
  from os import SEEK_END
  from multiprocessing import Value
  from .utils import align_to_page
  import ctypes
label_desc: Use image node_id 4 for calling the MemoryAllocator obj's underlying member method code with example usage: obj.space_left_in_page() and returns: unknown, int