Method doForward

guava/src/com/google/common/base/Converter.java:171–172

Returns a representation of {@code a} as an instance of type {@code B}. If {@code a} cannot be converted, an unchecked exception (such as {@link IllegalArgumentException}) should be thrown. @param a the instance to convert; will never be null @return the converted instance; <b>must not</b> be null

(A a)

   * @return the converted instance; <b>must not</b> be null
   */
  @ForOverride
  protected abstract B doForward(A a);

  /**
   * Returns a representation of {@code b} as an instance of type {@code A}. If {@code b} cannot be