monitor.leave();
    }
  }

  /**
   * Returns {@code true} if this queue contains the specified element. More formally, returns
   * {@code true} if and only if this queue contains at least one element {@code e} such that {@code
   * o.equals(e)}.
   *
   * @param o object to be checked for containment in this queue
   * @return {@code true} if this queue contains the specified element
   */

   * of the class's supertypes.
   *
   * <p>{@code putInstance(Foo.class, foo)} is equivalent to {@code
   * putInstance(TypeToken.of(Foo.class), foo)}.
   *
   * @return the value previously associated with this class (possibly {@code null}), or {@code
   *     null} if there was no previous entry.
   */
  @CanIgnoreReturnValue
  @CheckForNull
  <T extends B> T putInstance(Class<@NonNull T> type, @ParametricNullness T value);

  /**

   * of the class's supertypes.
   *
   * <p>{@code putInstance(Foo.class, foo)} is equivalent to {@code
   * putInstance(TypeToken.of(Foo.class), foo)}.
   *
   * @return the value previously associated with this class (possibly {@code null}), or {@code
   *     null} if there was no previous entry.
   */
  @CanIgnoreReturnValue
  @CheckForNull
  <T extends B> T putInstance(Class<@NonNull T> type, @ParametricNullness T value);

  /**

     * and providing a <code>message</code>.
     *
     * @param message
     * @param cause
     */
    public MojoExecutionException(String message, Throwable cause) {
        super(message, cause);
    }

    /**
     * Construct a new <code>MojoExecutionException</code> exception providing a <code>message</code>.
     *
     * @param message
     */
    public MojoExecutionException(String message) {

	ErrNotSupported = Error{
		Code:    http.StatusNotImplemented,
		APICode: "kms:NotSupported",
		Err:     "requested functionality is not supported",
	}
)

// Error is a KMS error that can be translated into an S3 API error.
//
// It does not implement the standard error Unwrap interface for
// better error log messages.
type Error struct {
	Code    int    // The HTTP status code returned to the client

   *       y}, if {@code equivalent(x, y)}, then {@code hash(x) == hash(y)}. It is <i>not</i>
   *       necessary that the hash be distributable across <i>inequivalence</i>. If {@code
   *       equivalence(x, y)} is false, {@code hash(x) == hash(y)} may still be true.
   *   <li>{@code hash(null)} is {@code 0}.
   * </ul>
   */

// Enabled indicates object locking is enabled
const Enabled = "Enabled"

// RetMode - object retention mode.
type RetMode string

const (
	// RetGovernance - governance mode.
	RetGovernance RetMode = "GOVERNANCE"

	// RetCompliance - compliance mode.
	RetCompliance RetMode = "COMPLIANCE"
)

// Valid - returns if retention mode is valid
func (r RetMode) Valid() bool {
	switch r {
	case RetGovernance, RetCompliance:

 *   <dt>From the IPv6 reserved documentation prefix ({@code 2001:db8::/32}), {@code "2001:db8::1"}.
 *   <dd>{@code 20 01 0d b8 00 00 00 00 00 00 00 00 00 00 00 01}
 *   <dt>An IPv6 "IPv4 compatible" (or "compat") address, {@code "::192.168.0.1"}.
 *   <dd>{@code 00 00 00 00 00 00 00 00 00 00 00 00 c0 a8 00 01}
 *   <dt>An IPv6 "IPv4 mapped" address, {@code "::ffff:192.168.0.1"}.
 *   <dd>{@code 00 00 00 00 00 00 00 00 00 00 ff ff c0 a8 00 01}
 * </dl>
 *

    /**
     * @param requiresProject <code>true</code> if the Mojo needs a Maven project to be executed, <code>false</code>
     * otherwise.
     */
    public void setProjectRequired(boolean requiresProject) {
        this.projectRequired = requiresProject;
    }

    /**
     * @return <code>true</code> if the Mojo needs a Maven project to be executed, <code>false</code> otherwise.
     */

	memTotalMD     = NewGaugeMD(memTotal, "Total memory on the node")
	memUsedMD      = NewGaugeMD(memUsed, "Used memory on the node")
	memUsedPercMD  = NewGaugeMD(memUsedPerc, "Used memory percentage on the node")
	memFreeMD      = NewGaugeMD(memFree, "Free memory on the node")
	memBuffersMD   = NewGaugeMD(memBuffers, "Buffers memory on the node")
	memCacheMD     = NewGaugeMD(memCache, "Cache memory on the node")