log4j-layout-template-json/src/main/java/org/apache/logging/log4j/layout/template/json/util/JsonWriter.java [70:87]:
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    static {
        final int[] table = new int[128];
        // Control chars need generic escape sequence
        for (int i = 0; i < 32; ++i) {
            // 04-Mar-2011, tatu: Used to use "-(i + 1)", replaced with constant
            table[i] = -1;
        }
        // Others (and some within that range too) have explicit shorter sequences
        table['"'] = '"';
        table['\\'] = '\\';
        // Escaping of slash is optional, so let's not add it
        table[0x08] = 'b';
        table[0x09] = 't';
        table[0x0C] = 'f';
        table[0x0A] = 'n';
        table[0x0D] = 'r';
        ESC_CODES = table;
    }
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log4j-core/src/main/java/org/apache/logging/log4j/core/util/JsonUtils.java [33:52]:
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    static {
        final int[] table = new int[128];
        // Control chars need generic escape sequence
        for (int i = 0; i < 32; ++i) {
            // 04-Mar-2011, tatu: Used to use "-(i + 1)", replaced with constant
            table[i] = -1;
        }
        /* Others (and some within that range too) have explicit shorter
         * sequences
         */
        table['"'] = '"';
        table['\\'] = '\\';
        // Escaping of slash is optional, so let's not add it
        table[0x08] = 'b';
        table[0x09] = 't';
        table[0x0C] = 'f';
        table[0x0A] = 'n';
        table[0x0D] = 'r';
        ESC_CODES = table;
    }
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