};
                    filters.add(new PredicateVersionFilter(predicate));
                } else {
                    throw new IllegalArgumentException("Unsupported filter expression: " + expression);
                }
            }
        }
        if (filters.isEmpty()) {
            return null;
        } else if (filters.size() == 1) {
            return filters.get(0);
        } else {

        @Nonnull
        public DependencyResolverRequestBuilder pathScope(@Nonnull PathScope pathScope) {
            this.pathScope = pathScope;
            return this;
        }

        /**
         * Filters the types of paths to include in the result.
         * The result will contain only the paths of types for which the predicate returned {@code true}.

    Verify that filter definitions are properly merged.
  </description>

  <build>
    <filters>
      <filter>src/main/filters/child-a.properties</filter>
      <filter>src/main/filters/child-c.properties</filter>
      <filter>src/main/filters/child-b.properties</filter>
      <filter>src/main/filters/child-d.properties</filter>
    </filters>
  </build>

  <build>
    <resources>
      <resource>
        <directory>${pom.build.directory}/generated-resources/plexus</directory>
      </resource>
    </resources>

    <filters>
      <filter>${pom.build.directory}/generated-filters.properties</filter>
    </filters>

    <directory>target</directory>

    <sourceDirectory>src/main/java</sourceDirectory>
    <testSourceDirectory>src/test/java</testSourceDirectory>

// The plugin manager should load up a directory structure of plugins.
// - a plugin per directory where the plugin is present with its deps
// - a plugin that has its dependencies packaged up with it
// - implement filters and create a test where a plugin fails if the right classes are not filtered
// - plugins with a dependency the same as the core but different versions, make it fail then fix it

  /*
 *
 * h2. Concerns for the plugin manager

resolve(ArtifactResolutionRe); } org/apache/maven/artifact/resolver/filter/AndArtifactFilter.class package org.apache.maven.artifact.resolver.filter; public synchronized class AndArtifactFilter implements ArtifactFilter { private final java.util.List filters; public void AndArtifactFilter(); public boolean include(org.apache.maven.artifact.Artifact); public void add(ArtifactFilter); } org/apache/maven/artifact/resolver/filter/ArtifactFilter.class package org.apache.maven.artifact.resolver.filter; public...