class_docstr: Dict-like container for Extension fields on proto instances.
  
  Note that in all cases we expect extension handles to be
  FieldDescriptors.
class_docstr_tok: ["Dict-like","container","for","Extension","fields","on","proto","instances",".","Note","that","in","all","cases","we","expect","extension","handles","to","be","FieldDescriptors","."]
docstr: Tries to find a known extension with the specified name.
  
  Args:
    name: Extension full name.
  
  Returns:
    Extension field descriptor.
docstr_tok: ["Tries","to","find","a","known","extension","with","the","specified","name",".","Args",":","name",":","Extension","full","name",".","Returns",":","Extension","field","descriptor","."]
code: def _FindExtensionByName(self, name):
      """Tries to find a known extension with the specified name.
  
      Args:
        name: Extension full name.
  
      Returns:
        Extension field descriptor.
      """
      return self._extended_message._extensions_by_name.get(name, None)
  
file_path: catboost/contrib/python/protobuf/py2/google/protobuf/internal/extension_dict.py
imports: from google.protobuf.internal import type_checkers
  from google.protobuf.descriptor import FieldDescriptor
label_desc: Use image node_id 9 for calling the _ExtensionDict obj's underlying member method code with example usage: obj._FindExtensionByName(name) and returns: self