* know which version of library the class comes from
 */

This document outlines the concerns of a general plugin manager that would be used in conjunction with any Plexus-based application. The following outlined concerns are an attempt to describe what a plugin manager would need to do for Maven and for Nexus.

h2. Concerns for the plugin manager

~~ under the License.

  ---
  Offline Mode Design
  ---
  John Casey
  ---
  2005-04-08
  ---

Offline Mode Design

* UPDATE: 18-April-2005

  We cannot take the approach outlined below of detecting which remote
  repositories are "really" offline, since offline mode is more of a behavior,
  and this will lead to counter-intuitive results. A different feature may exist

     */
    @Nonnull
    Optional<Source> locate(@Nonnull Path dir);

    /**
     * Parse the model obtained previously by a previous call to {@link #locate(Path)}.
     *
     * @param source the source to parse, never {@code null}
     * @param options possible parsing options, may be {@code null}

   on plugin goals execution order:

   * <<in a given phase, goals order is not expected to be guaranteed nor finely tuned>>:
     it is just a consequence of the order obtained during {{{../maven-model-builder/}effective model building}},
     which combines profile activation+injection and inheritance assembly from parents,

   * known limitations are notably that:

provided with the Content.  If no such license exists, contact the Redistributor.  Unless otherwise
indicated below, the terms and conditions of the EPL still apply to any source code in the Content
and such source code may be obtained at <a href="http://www.eclipse.org/">http://www.eclipse.org</a>.</p>

<h3>Third Party Content</h3>
<p>The Content includes items that have been sourced from third parties as set

     *         <code>null</code>. If it is <code>null</code>, the specified version range's recommended
     *         version is used (provided it is non-<code>null</code>). If no recommended version can be
     *         obtained, the returned version range's recommended version is set to <code>null</code>.
     *         </p>
     * @throws NullPointerException if the specified <code>VersionRange</code> is

     * undergone any updates by the model builder, e.g. reflects neither inheritance nor interpolation. The model
     * identifier should be from the collection obtained by {@link #getModelIds()}. As a special case, an empty string
     * can be used as the identifier for the super POM.
     *
     * @param modelId The identifier of the desired raw model, must not be {@code null}.

        props.putAll(getSystemProperties());
    }

    /**
     * Returns a copy of {@link System#getProperties()} in a thread-safe manner.
     *
     * @return {@link System#getProperties()} obtained in a thread-safe manner.
     */
    public static Properties getSystemProperties() {
        return copyProperties(System.getProperties());
    }

    /**