import com.google.javascript.rhino.jstype.Visitor; //导入依赖的package包/类
private FlowScope caseInstanceOf(Node left, Node right, FlowScope blindScope,
    boolean outcome) {
  JSType leftType = getTypeIfRefinable(left, blindScope);
  if (leftType == null) {
    return blindScope;
  }
  JSType rightType = right.getJSType();
  ObjectType targetType =
      typeRegistry.getNativeObjectType(JSTypeNative.UNKNOWN_TYPE);
  if (rightType != null && rightType.isFunctionType()) {
    targetType = rightType.toMaybeFunctionType();
  }
  Visitor<JSType> visitor;
  if (outcome) {
    visitor = new RestrictByTrueInstanceOfResultVisitor(targetType);
  } else {
    visitor = new RestrictByFalseInstanceOfResultVisitor(targetType);
  }
  return maybeRestrictName(
      blindScope, left, leftType, leftType.visit(visitor));
}
 

import com.google.javascript.rhino.jstype.Visitor; //导入依赖的package包/类
private FlowScope caseIsArray(Node value, FlowScope blindScope, boolean outcome) {
    JSType type = getTypeIfRefinable(value, blindScope);
  if (type != null) {
    Visitor<JSType> visitor = outcome ? restrictToArrayVisitor : restrictToNotArrayVisitor;
    return maybeRestrictName(blindScope, value, type, type.visit(visitor));
  }
  return blindScope;
}