code: def _parse_cached(self, s, dpi, prop, antialiased):
      from matplotlib.backends import backend_agg
  
      if prop is None:
          prop = FontProperties()
      fontset_class = _api.check_getitem(
          self._font_type_mapping, fontset=prop.get_math_fontfamily()
      )
      load_glyph_flags = {
          "vector": LOAD_NO_HINTING,
          "raster": backend_agg.get_hinting_flag(),
      }[self._output_type]
      fontset = fontset_class(prop, load_glyph_flags)
  
      fontsize = prop.get_size_in_points()
  
      if self._parser is None:  # Cache the parser globally.
          self.__class__._parser = _mathtext.Parser()
  
      box = self._parser.parse(s, fontset, fontsize, dpi)
      output = _mathtext.ship(box)
      if self._output_type == "vector":
          return output.to_vector()
      elif self._output_type == "raster":
          return output.to_raster(antialiased=antialiased)
  
file_path: matplotlib/lib/matplotlib/mathtext.py
imports: import functools
  import logging
  import matplotlib
  from matplotlib import _api, _mathtext
  from matplotlib.ft2font import LOAD_NO_HINTING
  from matplotlib.font_manager import FontProperties
  from ._mathtext import RasterParse, VectorParse, get_unicode_index
label_desc: Use image node_id 3 for calling the MathTextParser obj's underlying member method code with example usage: obj._parse_cached(s, dpi, prop, antialiased) and returns: output, output