for (Repository repository : repositories) {
            validateStringNotEmpty(
                    prefix, prefix2, "id", problems, Severity.ERROR, Version.V20, repository.getId(), null, repository);

            if (validateStringNotEmpty(
                    prefix,
                    prefix2,
                    "[" + repository.getId() + "].url",
                    problems,

        for (Repository repository : repositories) {
            validateStringNotEmpty(
                    prefix, prefix2, "id", problems, Severity.ERROR, Version.V20, repository.getId(), null, repository);

            if (validateStringNotEmpty(
                    prefix,
                    prefix2,
                    "[" + repository.getId() + "].url",
                    problems,

          <description>Display name for the plugin.</description>
        </field>
        <field>
          <name>prefix</name>
          <type>String</type>
          <required>true</required>
          <version>1.0.0+</version>
          <description>The plugin invocation prefix (i.e. eclipse for eclipse:eclipse)</description>
        </field>
        <field>
          <name>artifactId</name>

 */
package org.apache.maven.cli.transfer;

import org.apache.maven.api.services.MessageBuilder;

/**
 * Formats file size with the associated <a href="https://en.wikipedia.org/wiki/Metric_prefix">SI</a> prefix
 * (GB, MB, kB) and using the patterns <code>#0.0</code> for numbers between 1 and 10
 * and <code>###0</code> for numbers between 10 and 1000+ by default.
 *

        if (option == null) {
            throw new IllegalStateException("No option is associated to this path type.");
        }
        String prefix = (moduleName == null) ? "" : (moduleName + '=');
        StringJoiner joiner = new StringJoiner(File.pathSeparator, prefix, "");
        joiner.setEmptyValue("");
        for (Path p : paths) {
            joiner.add(p.toString());
        }

    /**
     * Returns immutable system properties to use for interpolation. The system properties are collected from the
     * runtime environment such as {@link System#getProperties()} and environment variables
     * (prefixed with {@code env.}).
     *
     * @return the system properties, never {@code null}
     */
    @Nonnull
    Map<String, String> getSystemProperties();

    /**

    }

    @Provides
    static Session newSession(RepositorySystem system, Lookup lookup) {
        Map<String, String> properties = new HashMap<>();
        // Env variables prefixed with "env."
        System.getenv().forEach((k, v) -> properties.put("env." + k, v));
        // Java System properties
        System.getProperties().forEach((k, v) -> properties.put(k.toString(), v.toString()));