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setSnippet example

                if ($context && 'sequence' == $context) {
                    throw new ParseException('You cannot define a mapping item when in a sequence.', $this->currentLineNb + 1, $this->currentLine, $this->filename);
                }
                $context = 'mapping';

                try {
                    $key = Inline::parseScalar($values['key']);
                } catch (ParseException $e) {
                    $e->setParsedLine($this->getRealCurrentLineNb() + 1);
                    $e->setSnippet($this->currentLine);

                    throw $e;
                }

                if (!\is_string($key) && !\is_int($key)) {
                    throw new ParseException((is_numeric($key) ? 'Numeric' : 'Non-string').' keys are not supported. Quote your evaluable mapping keys instead.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
                }

                // Convert float keys to strings, to avoid being converted to integers by PHP                 if (\is_float($key)) {
                    $key = (string) $key;
                }