class_docstr: A custom class for the Aitoff-Hammer projection, an equal-area map
  projection.
  
  https://en.wikipedia.org/wiki/Hammer_projection
class_docstr_tok: ["A","custom","class","for","the","Aitoff-Hammer","projection",",","an","equal-area","map","projection",".","https",":","\/\/en.wikipedia.org\/wiki\/Hammer_projection"]
code: def _get_core_transform(self, resolution):
      return self.HammerTransform(resolution)
  
imports: import numpy
  import matplotlib
  from matplotlib.axes import Axes
  import matplotlib.axis
  from matplotlib.patches import Circle
  from matplotlib.path import Path
  from matplotlib.projections import register_projection
  import matplotlib.spines
  from matplotlib.ticker import FixedLocator, Formatter, NullLocator
  from matplotlib.transforms import Affine2D, BboxTransformTo, Transform
label_desc: Use image node_id 2 for calling the HammerAxes obj's underlying member method code with example usage: obj._get_core_transform(resolution) and returns: self