question: public static boolean isNonMissingGt ( String gt ) { final int gtlen = gt . length ( ) ; for ( int i = 0 ; i < gtlen ; i ++ ) { final char c = gt . charAt ( i ) ; switch ( c ) { case PHASED_SEPARATOR : case UNPHASED_SEPARATOR : case MISSING_VALUE : continue ; default : return true ; } } return false ; }
target:  If any of the GT is non missing return true.