src/main/user-impl/java/com/mysql/cj/jdbc/result/ResultSetMetaData.java [369:377]:
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    public <T> T unwrap(Class<T> iface) throws SQLException {
        try {
            // This works for classes that aren't actually wrapping anything
            return iface.cast(this);
        } catch (ClassCastException cce) {
            throw SQLError.createSQLException(Messages.getString("Common.UnableToUnwrap", new Object[] { iface.toString() }),
                    MysqlErrorNumbers.SQLSTATE_CONNJ_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
        }
    }
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src/main/user-impl/java/com/mysql/cj/jdbc/MysqlParameterMetadata.java [191:199]:
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    public <T> T unwrap(Class<T> iface) throws SQLException {
        try {
            // This works for classes that aren't actually wrapping anything
            return iface.cast(this);
        } catch (ClassCastException cce) {
            throw SQLError.createSQLException(Messages.getString("Common.UnableToUnwrap", new Object[] { iface.toString() }),
                    MysqlErrorNumbers.SQLSTATE_CONNJ_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
        }
    }
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