this.artifacts = null;
        this.artifactMap = null;
    }

    /**
     * Sets the scope filter to select the artifacts being exposed to the currently executed mojo.
     * <strong>Warning:</strong> This is an internal utility method that is only public for technical reasons, it is not

- plugin execution error due to something that is not expected to go wrong (the compiler executable missing)
- asking to use a plugin for which you do not have a version defined - tools to easily select versions
- goal not found in a plugin (probably could list the ones that are)

 */

// PluginNotFoundException, PluginResolutionException, PluginDescriptorParsingException,
// CycleDetectedInPluginGraphException;

            Projects should only list the license(s) that applies to the project
            and not the licenses that apply to dependencies.
            If multiple licenses are listed, it is assumed that the user can select
            any of them, not that they must accept all.
            ]]>
          </description>
          <association>
            <type>License</type>
            <multiplicity>*</multiplicity>

    String ROLE = ToolchainManager.class.getName();

    /**
     * Retrieve toolchain of specified type from build context. It is expected that
     * <code>maven-toolchains-plugin</code> contains the configuration to select the appropriate
     * toolchain and is executed at the beginning of the build.
     *
     * @param type the type, must not be {@code null}
     * @param context the Maven session, must not be {@code null}

retrieve an object reference to the LogFactory instance that will be used to create Log instances for this application. This is normally accomplished by calling the static getFactory() method. This method implements the following discovery algorithm to select the name of the LogFactory implementation class this application wants to use: Check for a system property named org.apache.commons.logging.LogFactory. Use the JDK 1.3 JAR Services Discovery mechanism (see http://java.sun.com/j2se/1.3/docs/guide/jar/jar.html...

retrieve an object reference to the LogFactory instance that will be used to create Log instances for this application. This is normally accomplished by calling the static getFactory() method. This method implements the following discovery algorithm to select the name of the LogFactory implementation class this application wants to use: Check for a system property named org.apache.commons.logging.LogFactory. Use the JDK 1.3 JAR Services Discovery mechanism (see http://java.sun.com/j2se/1.3/docs/guide/jar/jar.html...