http://www.jboss.org/shrinkwrap-resolver-parent/shrinkwrap-resolver-impl-maven: Implementation for Resolving Dependencies from a Maven Backend (JBoss by Red Hat) 
public class org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector implements org.apache.maven.model.building.ModelProblemCollector
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector
  super_class: java.lang.Object
{
  private static final java.util.logging.Logger log;
    descriptor: Ljava/util/logging/Logger;
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL

  private boolean hasSevereFailures;
    descriptor: Z
    flags: (0x0002) ACC_PRIVATE

  private static volatile int[] $SWITCH_TABLE$org$apache$maven$model$building$ModelProblem$Severity;
    descriptor: [I
    flags: (0x104a) ACC_PRIVATE, ACC_STATIC, ACC_VOLATILE, ACC_SYNTHETIC

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 30
            ldc Lorg/jboss/shrinkwrap/resolver/impl/maven/logging/LogModelProblemCollector;
            invokevirtual java.lang.Class.getName:()Ljava/lang/String;
            invokestatic java.util.logging.Logger.getLogger:(Ljava/lang/String;)Ljava/util/logging/Logger;
            putstatic org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector.log:Ljava/util/logging/Logger;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=1, args_size=1
        start local 0 // org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector this
         0: .line 34
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 35
            aload 0 /* this */
            iconst_0
            putfield org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector.hasSevereFailures:Z
         2: .line 36
            return
        end local 0 // org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/jboss/shrinkwrap/resolver/impl/maven/logging/LogModelProblemCollector;

  public void add(org.apache.maven.model.building.ModelProblemCollectorRequest);
    descriptor: (Lorg/apache/maven/model/building/ModelProblemCollectorRequest;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector this
        start local 1 // org.apache.maven.model.building.ModelProblemCollectorRequest modelProblemCollectorRequest
         0: .line 42
            invokestatic org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector.$SWITCH_TABLE$org$apache$maven$model$building$ModelProblem$Severity:()[I
            aload 1 /* modelProblemCollectorRequest */
            invokevirtual org.apache.maven.model.building.ModelProblemCollectorRequest.getSeverity:()Lorg/apache/maven/model/building/ModelProblem$Severity;
            invokevirtual org.apache.maven.model.building.ModelProblem$Severity.ordinal:()I
            iaload
            tableswitch { // 1 - 3
                    1: 3
                    2: 3
                    3: 1
              default: 5
          }
         1: .line 44
      StackMap locals:
      StackMap stack:
            getstatic org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector.log:Ljava/util/logging/Logger;
            new java.lang.StringBuilder
            dup
            aload 1 /* modelProblemCollectorRequest */
            invokevirtual org.apache.maven.model.building.ModelProblemCollectorRequest.getMessage:()Ljava/lang/String;
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            ldc ", caused by: "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 1 /* modelProblemCollectorRequest */
            invokevirtual org.apache.maven.model.building.ModelProblemCollectorRequest.getException:()Ljava/lang/Exception;
            invokevirtual java.lang.Exception.getMessage:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokevirtual java.util.logging.Logger.warning:(Ljava/lang/String;)V
         2: .line 45
            goto 5
         3: .line 48
      StackMap locals:
      StackMap stack:
            getstatic org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector.log:Ljava/util/logging/Logger;
            new java.lang.StringBuilder
            dup
            aload 1 /* modelProblemCollectorRequest */
            invokevirtual org.apache.maven.model.building.ModelProblemCollectorRequest.getMessage:()Ljava/lang/String;
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            ldc ", caused by: "
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            aload 1 /* modelProblemCollectorRequest */
            invokevirtual org.apache.maven.model.building.ModelProblemCollectorRequest.getException:()Ljava/lang/Exception;
            invokevirtual java.lang.Exception.getMessage:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokevirtual java.util.logging.Logger.severe:(Ljava/lang/String;)V
         4: .line 49
            aload 0 /* this */
            iconst_1
            putfield org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector.hasSevereFailures:Z
         5: .line 52
      StackMap locals:
      StackMap stack:
            return
        end local 1 // org.apache.maven.model.building.ModelProblemCollectorRequest modelProblemCollectorRequest
        end local 0 // org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector this
      LocalVariableTable:
        Start  End  Slot                          Name  Signature
            0    6     0                          this  Lorg/jboss/shrinkwrap/resolver/impl/maven/logging/LogModelProblemCollector;
            0    6     1  modelProblemCollectorRequest  Lorg/apache/maven/model/building/ModelProblemCollectorRequest;
    MethodParameters:
                              Name  Flags
      modelProblemCollectorRequest  

  public boolean hasSevereFailures();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector this
         0: .line 55
            aload 0 /* this */
            getfield org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector.hasSevereFailures:Z
            ireturn
        end local 0 // org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/jboss/shrinkwrap/resolver/impl/maven/logging/LogModelProblemCollector;

  static int[] $SWITCH_TABLE$org$apache$maven$model$building$ModelProblem$Severity();
    descriptor: ()[I
    flags: (0x1008) ACC_STATIC, ACC_SYNTHETIC
    Code:
      stack=3, locals=1, args_size=0
         0: .line 29
            getstatic org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector.$SWITCH_TABLE$org$apache$maven$model$building$ModelProblem$Severity:[I
            dup
            ifnull 1
            areturn
      StackMap locals:
      StackMap stack: int[]
         1: pop
            invokestatic org.apache.maven.model.building.ModelProblem$Severity.values:()[Lorg/apache/maven/model/building/ModelProblem$Severity;
            arraylength
            newarray 10
            astore 0
         2: aload 0
            getstatic org.apache.maven.model.building.ModelProblem$Severity.ERROR:Lorg/apache/maven/model/building/ModelProblem$Severity;
            invokevirtual org.apache.maven.model.building.ModelProblem$Severity.ordinal:()I
            iconst_2
            iastore
         3: goto 5
      StackMap locals: int[]
      StackMap stack: java.lang.NoSuchFieldError
         4: pop
      StackMap locals:
      StackMap stack:
         5: aload 0
            getstatic org.apache.maven.model.building.ModelProblem$Severity.FATAL:Lorg/apache/maven/model/building/ModelProblem$Severity;
            invokevirtual org.apache.maven.model.building.ModelProblem$Severity.ordinal:()I
            iconst_1
            iastore
         6: goto 8
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
         7: pop
      StackMap locals:
      StackMap stack:
         8: aload 0
            getstatic org.apache.maven.model.building.ModelProblem$Severity.WARNING:Lorg/apache/maven/model/building/ModelProblem$Severity;
            invokevirtual org.apache.maven.model.building.ModelProblem$Severity.ordinal:()I
            iconst_3
            iastore
         9: goto 11
      StackMap locals:
      StackMap stack: java.lang.NoSuchFieldError
        10: pop
      StackMap locals:
      StackMap stack:
        11: aload 0
            dup
            putstatic org.jboss.shrinkwrap.resolver.impl.maven.logging.LogModelProblemCollector.$SWITCH_TABLE$org$apache$maven$model$building$ModelProblem$Severity:[I
            areturn
      LocalVariableTable:
        Start  End  Slot  Name  Signature
      Exception table:
        from    to  target  type
           2     3       4  Class java.lang.NoSuchFieldError
           5     6       7  Class java.lang.NoSuchFieldError
           8     9      10  Class java.lang.NoSuchFieldError
}
SourceFile: "LogModelProblemCollector.java"
InnerClasses:
  public final Severity = org.apache.maven.model.building.ModelProblem$Severity of org.apache.maven.model.building.ModelProblem