a debug message.

  * If the wagon is bound to "file://" then:

    Retrieve the file or base-url file to be "downloaded".

    * If the file (or more usefully, the base-url file) exists, proceed.

    * If the file (or base-url file) doesn't exist, assume that this location
      is part of a file-share. Ignore the request and print a debug message
      as above.

 with its <<<DefaultExceptionHandler>>> implementation
 ({{{./xref/org/apache/maven/exception/DefaultExceptionHandler.html}source}}), use to transform exception into useful end-user messages.

* Toolchains

 * {{{./toolchains.html}Toolchains descriptor reference}},

                                    <message>Current JDK version ${java.version} should be ${jdkVersion}, or higher!
                                    </message>
                                    <version>${jdkVersion}</version>
                                </requireJavaVersion>
                                <requireNoRepositories>