changes primary underlying symbol for options . example : `` c '' , '' / ygm9 '' concode_field_sep String product concode_elem_sep double strike concode_elem_sep Map<String,OptionChain<T>> chains concode_elem_sep OptionSeries<T> series concode_elem_sep String cfi concode_elem_sep String underlying concode_field_sep void setProduct concode_elem_sep void setSPC concode_elem_sep void setCFI concode_elem_sep Map<String,OptionChain<T>> getChains concode_elem_sep void setLastTrade concode_elem_sep void setExpirationStyle concode_elem_sep void setExpiration concode_elem_sep void setMultiplier concode_elem_sep void setAdditionalUnderlyings concode_elem_sep void addOption concode_elem_sep OptionChainsBuilder<InstrumentProfile> build concode_elem_sep void setMMY concode_elem_sep void setOptionType concode_elem_sep void setStrike concode_elem_sep OptionChain<T> getOrCreateChain concode_elem_sep void setSettlementStyle
void function ( String arg0 ) { this . underlying = arg0 == null || arg0 . isEmpty ( ) ? "srini_string" : arg0 ; }