class_docstr: A mapping of registered projection names to projection classes.
docstr: Return the names of all projections currently registered.
code: def get_projection_names(self):
      """Return the names of all projections currently registered."""
      return sorted(self._all_projection_types)
  
file_path: catboost/contrib/python/matplotlib/py3/matplotlib/projections/__init__.py
imports: from ..None import axes, _docstring
  from .geo import AitoffAxes, HammerAxes, LambertAxes, MollweideAxes
  from .polar import PolarAxes
label_desc: Use image node_id 4 for calling the ProjectionRegistry obj's underlying member method code with example usage: obj.get_projection_names() and returns: sorted