code: package input;
  
  import com.google.javascript.jscomp.newtypes.JSType;
  import com.google.common.base.Joiner;
  import com.google.common.base.Predicate;
  import com.google.common.collect.ImmutableList;
  import com.google.javascript.rhino.ErrorReporter;
  import com.google.javascript.rhino.jstype.UnionTypeBuilder;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  import java.util.SortedSet;
  import java.util.TreeSet;
  
  class Test_npe1 {
  
      JSType meet(JSType that) {
        UnionTypeBuilder builder = new UnionTypeBuilder(registry);
        for (int i = 0; i < alternatesWithoutStucturalTyping.size(); i++) {
          JSType alternate = alternatesWithoutStucturalTyping.get(i);
          if (alternate.isSubtype(that)) {
            builder.addAlternate(alternate);
          }
        }
  
        if (that.isUnionType()) {
          List<JSType> thoseAlternatesWithoutStucturalTyping =
              that.toMaybeUnionType().alternatesWithoutStucturalTyping;
          for (int i = 0; i < thoseAlternatesWithoutStucturalTyping.size(); i++) {
            JSType otherAlternate = thoseAlternatesWithoutStucturalTyping.get(i);
            if (otherAlternate.isSubtype(this)) {
              builder.addAlternate(otherAlternate);
            }
          }
        } else if (that.isSubtype(this)) {
          builder.addAlternate(that);
        }
        JSType result = builder.build();
        if (!result.isNoType()) {
          return result;
        } else if (this.isObject() && (that.isObject() && !that.isNoType())) {
          return getNativeType(JSTypeNative.NO_OBJECT_TYPE);
        } else {
          return getNativeType(JSTypeNative.NO_TYPE);
        }
      }
  }