public Type wildUpperBound ( Type t ) { if ( t . hasTag ( WILDCARD ) ) { WildcardType w = ( WildcardType ) t ; if ( w . isSuperBound ( ) ) return w . bound == null ? syms . objectType : w . bound . bound ; else return wildUpperBound ( w . type ) ; } else return t ; }
Get a wildcard s upper bound returning non - wildcards unchanged .