class_docstr: A class for representing multivariate polynomial rings. 
docstr: Returns a field associated with `self`. 
docstr_tok: ["Returns","a","field","associated","with","`","self","`","."]
code: def get_field(self):
      """Returns a field associated with `self`."""
      return self.ring.to_field().to_domain()
  
imports: from sympy.polys.domains.ring import Ring
  from sympy.polys.domains.compositedomain import CompositeDomain
  from sympy.polys.polyerrors import CoercionFailed, GeneratorsError
  from sympy.utilities import public
label_desc: Use image node_id 27 for calling the PolynomialRing obj's underlying member method code with example usage: obj.get_field() and returns: self