private void Expand(Disjunction disjunction)
{
if (disjunction.Any())
{
builder.Append('(');
var head = true;
foreach (var item in disjunction)
{
if (head)
{
head = false;
}
else
{
builder.AppendLine().Append((item is Disjunction) ? "or " : "and ");
}
ExpandExpression(item);
}
builder.Append(')');
}
}