class_docstr: Default class from which all Constraint implementations inherit.
class_docstr_tok: ["Default","class","from","which","all","Constraint","implementations","inherit","."]
code: def __call__(self):
      raise NotImplementedError("Subclasses must implement this method")
  
imports: from fnmatch import fnmatch
  import torch
  from .callbacks import Callback
label_desc: Use image node_id 1 for calling the Constraint obj's underlying member method code with example usage: obj.__call__() without return types