@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
IdentifierNode that = (IdentifierNode) o;
return base != null ? base.equals(that.base) : that.base == null && name.equals(that.name);
}
@Override
public int hashCode() {
int result = base != null ? base.hashCode() : 0;
result = 31 * result + name.hashCode();
return result;
}