SunPy 4.0.0
sunpy.coordinates
sunpy.data
sunpy.database
sunpy.image
sunpy.io
sunpy.map
sunpy.net
sunpy.physics
sunpy.sun
sunpy.time
sunpy.timeseries
sunpy.util
sunpy.visualization
Warning class for cases metadata is missing.
This does not inherit from SunpyWarning because we want to use stacklevel=3 to show the user where the issue occurred in their code.