'Requires:
line --line to parse
Returns:
nothing
Logic:
Collect all the lines until the end of the field is reached.
Process these lines with the module rtr.field_strings.
Check if the field instruction is \'Symbol\' (really UTF-8).'

def __field_instruction_func(self, line):

    if (self.__cb_count == self.__field_instruction_count):
        self.__field_string[(-1)] += line
        my_list = self.__string_obj.process_string(self.__field_instruction_string, 'field_instruction')
        instruction = my_list[2]
        self.__field_instruction.append(instruction)
        if (my_list[0] == 'Symbol'):
            self.__symbol = 1
        self.__state = 'field'
        self.__field_instruction_string = ''
    else:
        self.__field_instruction_string += line
