return map.keySet().iterator();
    }

    /**
     * Returns the number of elements in this set (its cardinality).
     *
     * @return the number of elements in this set (its cardinality).
     */
    @Override
    public int size() {
        return map.size();
    }

    /**
     * Returns true if this set contains no elements.
     *
     * @return true if this set contains no elements.

		if err := tag.Validate(); err != nil {
			return err
		}
	}

	for _, meta := range ef.Metadata {
		if err := meta.Validate(); err != nil {
			return err
		}
	}
	if err := ef.Purge.Validate(); err != nil {
		return err
	}
	if err := ef.Size.Validate(); err != nil {
		return err
	}
	if ef.CreatedBefore != nil && !ef.CreatedBefore.Before(time.Now()) {
		return BatchJobYamlErr{
			line: ef.line,

		return authTypeStreamingUnsignedTrailer
	} else if isRequestSignatureV4(r) {
		return authTypeSigned
	} else if isRequestPresignedSignatureV4(r) {
		return authTypePresigned
	} else if isRequestJWT(r) {
		return authTypeJWT
	} else if isRequestPostPolicySignatureV4(r) {
		return authTypePostPolicy
	} else if _, ok := r.Form[xhttp.Action]; ok {
		return authTypeSTS
	} else if _, ok := r.Header[xhttp.Authorization]; !ok {

        if (extension == null) {
            return path;
        }
        final String ext = "." + extension;
        if (path.endsWith(ext)) {
            return path;
        }
        return path.replace('.', '/') + ext;
    }

    /**
     * Returns the resource path.
     *
     * @param clazz
     *            The class. Must not be {@literal null}.
     * @return The resource path.
     */

     *            the substring to find
     * @return true if the string contains the substring, false otherwise
     */
    public static boolean contains(final String s1, final String s2) {
        if (isEmpty(s1)) {
            return false;
        }
        return s1.indexOf(s2) >= 0;
    }

    /**
     * Returns whether two strings are equal. If both are null, returns <code>true</code>.
     *
     * @param target1

          return null
        }

        if (retryAfter(userResponse, Integer.MAX_VALUE) == 0) {
          // specifically received an instruction to retry without delay.
          return userResponse.request
        }

        return null
      }

      HTTP_MISDIRECTED_REQUEST -> {

            while (urlpath.charAt(i) != '/') {
                i--;
            }
            return urlpath.substring(i + 1);
        }
        if (shr != null) {
            return shr + '/';
        }
        if (this.url.getHost().length() > 0) {
            return this.url.getHost() + '/';
        }
        return "smb://";
    }

    /**
     * {@inheritDoc}
     *

        }

        /**
         * @return URL
         */
        public URL getURL() {
            return url_;
        }

        /**
         * @param url
         */
        public void setURL(final URL url) {
            url_ = url;
        }

        /**
         * @return Returns the cal.
         */
        public Calendar getCal() {

	// ignore modtime zero objects
	if oi.ModTime.IsZero() {
		return roi
	}

	if isVeeamSOSAPIObject(oi.Name) {
		return roi
	}
	if rcfg.Config == nil || rcfg.remotes == nil {
		return roi
	}
	roi = getHealReplicateObjectInfo(oi, rcfg)
	roi.RetryCount = uint32(retryCount)
	if !roi.Dsc.ReplicateAny() {
		return
	}
	// early return if replication already done, otherwise we need to determine if this

		return `ongoing-request="true"`
	}
	return fmt.Sprintf(`ongoing-request="false", expiry-date="%s"`, r.expiry.Format(http.TimeFormat))
}

// Expiry returns expiry of restored object and true if restore-object has completed.
// Otherwise returns zero value of time.Time and false.
func (r restoreObjStatus) Expiry() (time.Time, bool) {
	if r.Ongoing() {
		return time.Time{}, false
	}
	return r.expiry, true