checkNonnegative(occurrences, "occurrences");
      if (occurrences == 0) {
        return count(element);
      }

      Collection<V> values = Maps.safeGet(multimap.asMap(), element);

      if (values == null) {
        return 0;
      }

      int oldCount = values.size();
      if (occurrences >= oldCount) {
        values.clear();

        // Verify correct email format
        assertEquals("******@****.***", technicalEmail);
        assertEquals("******@****.***", supportEmail);

        // Count @ occurrences - should be exactly 1
        assertEquals(1, technicalEmail.chars().filter(ch -> ch == '@').count());
        assertEquals(1, supportEmail.chars().filter(ch -> ch == '@').count());
    }

    @Test

   */
  @Override
  public abstract String toString();

  /**
   * Returns the value of each present instance from the supplied {@code optionals}, in order,
   * skipping over occurrences of {@link Optional#absent}. Iterators are unmodifiable and are
   * evaluated lazily.
   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> this method has no equivalent in Java 8's

   */
  @Override
  public abstract String toString();

  /**
   * Returns the value of each present instance from the supplied {@code optionals}, in order,
   * skipping over occurrences of {@link Optional#absent}. Iterators are unmodifiable and are
   * evaluated lazily.
   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> this method has no equivalent in Java 8's

        assertNull(result, "Should return null for empty list");
    }

    /**
     * Test remove method
     */
    @Test
    @DisplayName("Remove should delete all occurrences of type")
    void testRemove() {
        List<AvPair> pairs = new LinkedList<>();
        AvFlags flags1 = new AvFlags(0x11111111);
        AvFlags flags2 = new AvFlags(0x22222222);

 * error message template strings. This only supports the {@code "%s"} specifier, not the full range
 * of {@link java.util.Formatter} specifiers. However, note that if the number of arguments does not
 * match the number of occurrences of {@code "%s"} in the format string, {@code Verify} will still
 * behave as expected, and will still include all argument values in the error message; the message
 * will simply not be formatted exactly as intended.
 *

     * @return true if not empty, false otherwise
     */
    public static final boolean isNotEmpty(final String text) {
        return !isEmpty(text);
    }

    /**
     * Replaces all occurrences of a substring within a string with another string.
     *
     * @param text
     *            The original string.
     * @param fromText
     *            The substring to be replaced.
     * @param toText

        }
        return StringUtil.EMPTY;
    }

    /**
     * Replaces all occurrences of a regular expression pattern in the input string.
     *
     * @param input the input object to process
     * @param regex the regular expression pattern to match
     * @param replacement the replacement string

 * error message template strings. This only supports the {@code "%s"} specifier, not the full range
 * of {@link java.util.Formatter} specifiers. However, note that if the number of arguments does not
 * match the number of occurrences of {@code "%s"} in the format string, {@code Verify} will still
 * behave as expected, and will still include all argument values in the error message; the message
 * will simply not be formatted exactly as intended.
 *

 * splitter.trimResults(); // does nothing!
 * return splitter.split("wrong / wrong / wrong");
 * }
 *
 * <p>For separator-based splitters that do not use {@code omitEmptyStrings}, an input string
 * containing {@code n} occurrences of the separator naturally yields an iterable of size {@code n +
 * 1}. So if the separator does not occur anywhere in the input, a single substring is returned