class_docstr: docstring
class_docstr_tok: ["docstring"]
code: def __sub__(self, other):
      if not isinstance(other, DomainScalar):
          return NotImplemented
      self, other = self.unify(other)
      return self.new(self.element - other.element, self.domain)
  
imports: from ..constructor import construct_domain
  from sympy.polys.domains import Domain, ZZ
label_desc: Use image node_id 11 for calling the DomainScalar obj's underlying member method code with example usage: obj.__sub__(other) and returns: self, NotImplemented