/src/main/java/net/finmath/montecarlo/interestrate/products/indices/ProductIndex.java
underlyingNames.addAll ( underlyingNames2 ) ;
@Override public Set<String> queryUnderlyings() { Set<String> underlyingNames = index1.queryUnderlyings(); final Set<String> underlyingNames2 = index2.queryUnderlyings(); if(underlyingNames2 != null) { if(underlyingNames != null) { <extra_id_0> } else { underlyingNames = underlyingNames2; } } return underlyingNames; }