Method is

android/guava/src/com/google/common/reflect/TypeToken.java:984–999

{@code A.is(B)} is defined as {@code Foo<A>.isSubtypeOf(Foo<B>)}. <p>Specifically, returns true if any of the following conditions is met: <ol> <li>'this' and {@code formalType} are equal. <li>'this' and {@code formalType} have equal canonical form. <li>{@code formalType} is {@code <? extend

(Type formalType, TypeVariable<?> declaration)

   *     bound when {@code formalType} is a wildcard with implicit upper bound.
   */
  private boolean is(Type formalType, TypeVariable<?> declaration) {
    if (runtimeType.equals(formalType)) {
      return true;
    }
    if (formalType instanceof WildcardType) {
      WildcardType your = canonicalizeWildcardType(declaration, (WildcardType) formalType);
      // if "formalType" is <? extends Foo>, "this" can be:
      // Foo, SubFoo, <? extends Foo>, <? extends SubFoo>, <T extends Foo> or
      // <T extends SubFoo>.
      // if "formalType" is <? super Foo>, "this" can be:
      // Foo, SuperFoo, <? super Foo> or <? super SuperFoo>.
      return every(your.getUpperBounds()).isSupertypeOf(runtimeType)
          && every(your.getLowerBounds()).isSubtypeOf(runtimeType);
    }
    return canonicalizeWildcardsInType(runtimeType).equals(canonicalizeWildcardsInType(formalType));
  }

  /**
   * In reflection, {@code Foo<?>.getUpperBounds()[0]} is always {@code Object.class}, even when Foo