// Make sure any simple boolean field clauses are suitable
left = getBooleanExpressionForUseInFilter(left);
right = getBooleanExpressionForUseInFilter(right);
}
left.encloseInParentheses();
right.encloseInParentheses();
BooleanExpression opExpr = left.ior(right);
stack.push(opExpr);
return opExpr;
}