class Protobuf::Message

def self.get_ext_field_by_name(name)
  # Check if the name has been used before, if not then set it to the sym value
  extension_fields[extension_field_name_to_tag[name.to_sym]]
rescue TypeError, NoMethodError => e
  name = 'nil' if name.nil?
  raise FieldNotDefinedError.new("Field '#{name}' is not defined on message '#{self.name}'")
end