docs: def read(self, size=1):
          """
          Read byte buffer with specified size from input file.
          Raise exception in two cases:
              - File already closed.
              - Not enough data to read.
  
          Keyword arguments:
          size -- size of buffer to read (default 1)
          """
          if self.is_closed_flag:
              raise Exception("Unable to read - already closed!")
          if self.get_remaining_size() < size:
              raise Exception("Unable to read byte buffer - too short remaining data size!")
          self.read_count += size
          return self.file.read(size)