class_docstr: Labelled arrow for use as a quiver plot scale key.
class_docstr_tok: ["Labelled","arrow","for","use","as","a","quiver","plot","scale","key","."]
code: def _text_shift(self):
      return {
          "N": (0, +self.labelsep),
          "S": (0, -self.labelsep),
          "E": (+self.labelsep, 0),
          "W": (-self.labelsep, 0),
      }[self.labelpos]
  
imports: import math
  import numpy
  from numpy import ma
  from matplotlib import _api, cbook, _docstring
  import matplotlib.artist
  import matplotlib.collections
  from matplotlib.patches import CirclePolygon
  import matplotlib.text
  import matplotlib.transforms
label_desc: Use image node_id 4 for calling the QuiverKey obj's underlying member method code with example usage: obj._text_shift() and returns: dict