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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _error_if_symbol_unused(symbol_word, technical_words_dictionary, line_offset, col_offset):
 """Return SpellcheckError if this symbol is not used in the code."""

    result = technical_words_dictionary.corrections(symbol_word,
                                                    distance=5,
                                                    prefix=0)
    if not result.valid:
        return SpellcheckError(symbol_word,
                               line_offset,
                               col_offset,
                               result.suggestions,
                               SpellcheckError.TechnicalWord)