parameters: (self, key)
return_statement: return self.fields[key].struct_value
docstring: Returns a struct for this key, creating if it didn't exist already.
docstring_summary: Returns a struct for this key, creating if it didn't exist already.
docstring_tokens: Returns a struct for this key creating if it didn t exist already .
function: def get_or_create_struct(self, key):
      """Returns a struct for this key, creating if it didn't exist already."""
      return self.fields[key].struct_value
function_tokens: def get_or_create_struct ( self , key ) : return self . fields [ key ] . struct_value