Docker and similar tools also use an **internal cache** when building the image, if a file hasn't changed since the last time building the container image, then it will **reuse the same layer** created the last time, instead of copying the file again and creating a new layer from scratch.

Luego vas al mostrador 🔀, a la tarea inicial que ya está terminada ⏯, recoges las hamburguesas 🍔, les dices gracias y las llevas a la mesa. Eso termina esa fase / tarea de interacción con el mostrador ⏹. Eso a su vez, crea una nueva tarea, "comer hamburguesas" 🔀 ⏯, pero la anterior de "conseguir hamburguesas" está terminada ⏹.

### Hamburguesas Paralelas

    }

    @Override
    public E first() {
      synchronized (mutex) {
        return delegate().first();
      }
    }

    @Override
    public E last() {
      synchronized (mutex) {
        return delegate().last();
      }
    }

    private static final long serialVersionUID = 0;
  }

  private static <E extends @Nullable Object> List<E> list(

    }

    @Override
    public E first() {
      synchronized (mutex) {
        return delegate().first();
      }
    }

    @Override
    public E last() {
      synchronized (mutex) {
        return delegate().last();
      }
    }

    private static final long serialVersionUID = 0;
  }

  private static <E extends @Nullable Object> List<E> list(

    checkArgument(
        bytes.length == 4,
        "Byte array has invalid length for an IPv4 address: %s != 4.",
        bytes.length);

    // Given a 4-byte array, this cast should always succeed.
    return (Inet4Address) bytesToInetAddress(bytes, null);
  }

  /**
   * Returns the {@link InetAddress} having the given string representation.
   *

    }

    void testIsOrdered() {
      assertTrue(ordering.isOrdered(strictlyOrderedList));
      assertTrue(ordering.isStrictlyOrdered(strictlyOrderedList));
    }

    // generic arrays and unchecked cast
    void testMinAndMax() {
      List<T> shuffledList = Lists.newArrayList(strictlyOrderedList);
      shuffledList = shuffledCopy(shuffledList, new Random(5));

      T min = strictlyOrderedList.get(0);

    }

    void testIsOrdered() {
      assertTrue(ordering.isOrdered(strictlyOrderedList));
      assertTrue(ordering.isStrictlyOrdered(strictlyOrderedList));
    }

    // generic arrays and unchecked cast
    void testMinAndMax() {
      List<T> shuffledList = Lists.newArrayList(strictlyOrderedList);
      shuffledList = shuffledCopy(shuffledList, new Random(5));

      T min = strictlyOrderedList.get(0);

              }
            }
          }
        }

        @Override
        public int read(byte[] buf, int off, int len) throws IOException {
          // Overriding this to work around the fact that InputStream's default implementation of
          // this method will silently swallow exceptions thrown by the single-byte read() method

			return
		}

		region = regionKV.Get(RegionName)
	}
	if region != "" {
		if !validRegionRegex.MatchString(region) {
			err = Errorf(
				"region '%s' is invalid, expected simple characters such as [us-east-1, myregion...]",
				region)
			return
		}
		s.region = region
	}

	name := env.Get(EnvSiteName, siteKV.Get(NameKey))
	if name != "" {
		if !validSiteNameRegex.MatchString(name) {

    public static final String CONSTRAINTS_Null_MESSAGE = "{constraints.Null.message}";

    /** The key of the message: {item} must be in the past. */
    public static final String CONSTRAINTS_Past_MESSAGE = "{constraints.Past.message}";

    /** The key of the message: {item} must match "{regexp}". */
    public static final String CONSTRAINTS_Pattern_MESSAGE = "{constraints.Pattern.message}";