http://www.jboss.org/shrinkwrap-resolver-parent/shrinkwrap-resolver-impl-maven: Implementation for Resolving Dependencies from a Maven Backend (JBoss by Red Hat) 
final class org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter extends java.lang.Enum<org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter> implements org.jboss.shrinkwrap.resolver.api.maven.filter.MavenResolutionFilter
  minor version: 0
  major version: 59
  flags: flags: (0x4030) ACC_FINAL, ACC_SUPER, ACC_ANNOTATION
  this_class: org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter
  super_class: java.lang.Enum
{
  public static final org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter INSTANCE;
    descriptor: Lorg/jboss/shrinkwrap/resolver/impl/maven/PostResolutionFilterApplicator$RestrictPomArtifactFilter;
    flags: (0x4019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL, ACC_ANNOTATION

  private static final org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter[] ENUM$VALUES;
    descriptor: [Lorg/jboss/shrinkwrap/resolver/impl/maven/PostResolutionFilterApplicator$RestrictPomArtifactFilter;
    flags: (0x101a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=4, locals=0, args_size=0
         0: .line 73
            new org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter
            dup
            ldc "INSTANCE"
            iconst_0
            invokespecial org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter.<init>:(Ljava/lang/String;I)V
            putstatic org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter.INSTANCE:Lorg/jboss/shrinkwrap/resolver/impl/maven/PostResolutionFilterApplicator$RestrictPomArtifactFilter;
         1: .line 71
            iconst_1
            anewarray org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter
            dup
            iconst_0
            getstatic org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter.INSTANCE:Lorg/jboss/shrinkwrap/resolver/impl/maven/PostResolutionFilterApplicator$RestrictPomArtifactFilter;
            aastore
            putstatic org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter.ENUM$VALUES:[Lorg/jboss/shrinkwrap/resolver/impl/maven/PostResolutionFilterApplicator$RestrictPomArtifactFilter;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  private void <init>(java.lang.String, int);
    descriptor: (Ljava/lang/String;I)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=3, locals=3, args_size=3
        start local 0 // org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter this
         0: .line 71
            aload 0 /* this */
            aload 1
            iload 2
            invokespecial java.lang.Enum.<init>:(Ljava/lang/String;I)V
            return
        end local 0 // org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/jboss/shrinkwrap/resolver/impl/maven/PostResolutionFilterApplicator$RestrictPomArtifactFilter;
    MethodParameters:
               Name  Flags
      $enum$name     
      $enum$ordinal  

  public boolean accepts(org.jboss.shrinkwrap.resolver.api.maven.coordinate.MavenDependency, java.util.List<org.jboss.shrinkwrap.resolver.api.maven.coordinate.MavenDependency>, java.util.List<org.jboss.shrinkwrap.resolver.api.maven.coordinate.MavenDependency>);
    descriptor: (Lorg/jboss/shrinkwrap/resolver/api/maven/coordinate/MavenDependency;Ljava/util/List;Ljava/util/List;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=4, args_size=4
        start local 0 // org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter this
        start local 1 // org.jboss.shrinkwrap.resolver.api.maven.coordinate.MavenDependency coordinate
        start local 2 // java.util.List dependenciesForResolution
        start local 3 // java.util.List dependencyAncestors
         0: .line 84
            getstatic org.jboss.shrinkwrap.resolver.api.maven.PackagingType.POM:Lorg/jboss/shrinkwrap/resolver/api/maven/PackagingType;
            aload 1 /* coordinate */
            invokeinterface org.jboss.shrinkwrap.resolver.api.maven.coordinate.MavenDependency.getPackaging:()Lorg/jboss/shrinkwrap/resolver/api/maven/PackagingType;
            invokevirtual org.jboss.shrinkwrap.resolver.api.maven.PackagingType.equals:(Ljava/lang/Object;)Z
            ifeq 6
         1: .line 85
            getstatic org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator.log:Ljava/util/logging/Logger;
            getstatic java.util.logging.Level.FINER:Ljava/util/logging/Level;
            invokevirtual java.util.logging.Logger.isLoggable:(Ljava/util/logging/Level;)Z
            ifeq 5
         2: .line 86
            getstatic org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator.log:Ljava/util/logging/Logger;
            new java.lang.StringBuilder
            dup
            ldc "Filtering out POM dependency resolution: "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 1 /* coordinate */
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/Object;)Ljava/lang/StringBuilder;
         3: .line 87
            ldc "; its transitive dependencies will be included"
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
         4: .line 86
            invokevirtual java.util.logging.Logger.finer:(Ljava/lang/String;)V
         5: .line 90
      StackMap locals:
      StackMap stack:
            iconst_0
            ireturn
         6: .line 92
      StackMap locals:
      StackMap stack:
            iconst_1
            ireturn
        end local 3 // java.util.List dependencyAncestors
        end local 2 // java.util.List dependenciesForResolution
        end local 1 // org.jboss.shrinkwrap.resolver.api.maven.coordinate.MavenDependency coordinate
        end local 0 // org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter this
      LocalVariableTable:
        Start  End  Slot                       Name  Signature
            0    7     0                       this  Lorg/jboss/shrinkwrap/resolver/impl/maven/PostResolutionFilterApplicator$RestrictPomArtifactFilter;
            0    7     1                 coordinate  Lorg/jboss/shrinkwrap/resolver/api/maven/coordinate/MavenDependency;
            0    7     2  dependenciesForResolution  Ljava/util/List<Lorg/jboss/shrinkwrap/resolver/api/maven/coordinate/MavenDependency;>;
            0    7     3        dependencyAncestors  Ljava/util/List<Lorg/jboss/shrinkwrap/resolver/api/maven/coordinate/MavenDependency;>;
    Exceptions:
      throws java.lang.IllegalArgumentException
    Signature: (Lorg/jboss/shrinkwrap/resolver/api/maven/coordinate/MavenDependency;Ljava/util/List<Lorg/jboss/shrinkwrap/resolver/api/maven/coordinate/MavenDependency;>;Ljava/util/List<Lorg/jboss/shrinkwrap/resolver/api/maven/coordinate/MavenDependency;>;)Z
    MethodParameters:
                           Name  Flags
      coordinate                 final
      dependenciesForResolution  final
      dependencyAncestors        final

  public static org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter[] values();
    descriptor: ()[Lorg/jboss/shrinkwrap/resolver/impl/maven/PostResolutionFilterApplicator$RestrictPomArtifactFilter;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=5, locals=3, args_size=0
         0: .line 1
            getstatic org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter.ENUM$VALUES:[Lorg/jboss/shrinkwrap/resolver/impl/maven/PostResolutionFilterApplicator$RestrictPomArtifactFilter;
            dup
            astore 0
            iconst_0
            aload 0
            arraylength
            dup
            istore 1
            anewarray org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter
            dup
            astore 2
            iconst_0
            iload 1
            invokestatic java.lang.System.arraycopy:(Ljava/lang/Object;ILjava/lang/Object;II)V
            aload 2
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public static org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter valueOf(java.lang.String);
    descriptor: (Ljava/lang/String;)Lorg/jboss/shrinkwrap/resolver/impl/maven/PostResolutionFilterApplicator$RestrictPomArtifactFilter;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
         0: .line 1
            ldc Lorg/jboss/shrinkwrap/resolver/impl/maven/PostResolutionFilterApplicator$RestrictPomArtifactFilter;
            aload 0
            invokestatic java.lang.Enum.valueOf:(Ljava/lang/Class;Ljava/lang/String;)Ljava/lang/Enum;
            checkcast org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
    MethodParameters:
      Name  Flags
      name  
}
Signature: Ljava/lang/Enum<Lorg/jboss/shrinkwrap/resolver/impl/maven/PostResolutionFilterApplicator$RestrictPomArtifactFilter;>;Lorg/jboss/shrinkwrap/resolver/api/maven/filter/MavenResolutionFilter;
SourceFile: "PostResolutionFilterApplicator.java"
NestHost: org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator
InnerClasses:
  private final RestrictPomArtifactFilter = org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator$RestrictPomArtifactFilter of org.jboss.shrinkwrap.resolver.impl.maven.PostResolutionFilterApplicator