* been resolved and it is not a domain SID or builtin account,
     * the full DOMAIN\name form of the account will be
     * returned (e.g. MYDOM\alice or MYDOM\Domain Users).
     * If the SID has been resolved but it is is a domain SID,
     * only the domain name will be returned (e.g. MYDOM).
     * If the SID has been resolved but it is a builtin account,
     * only the name component will be returned (e.g. SYSTEM).

     * 
     * @param type
     * @return instance for type, null if the type cannot be unwrapped
     */
    <T extends Credentials> T unwrap ( Class<T> type );


    /**
     * @return the domain the user account is in
     */
    String getUserDomain ();


    /**
     * @return whether these are anonymous credentials
     */
    boolean isAnonymous ();


    /**

import java.util.List;

import org.apache.maven.api.model.InputLocation;

/**
 * Collects problems that are encountered during model building. The primary purpose of this component is to account for
 * the fact that the problem reporter has/should not have information about the calling context and hence cannot provide

        "All pipe instances are busy.",
        "The pipe is being closed.",
        "No process is on the other end of the pipe.",
        "More data is available.",
        "This user account has expired.",
        "The user is not allowed to log on from this workstation.",
        "The user is not allowed to log on at this time.",
        "The password of this user has expired.",
    };

  FILE_SEPARATOR("file.separator"),

  /** Path separator (":" on UNIX). */
  PATH_SEPARATOR("path.separator"),

  /** Line separator ("\n" on UNIX). */
  LINE_SEPARATOR("line.separator"),

  /** User's account name. */
  USER_NAME("user.name"),

  /** User's home directory. */
  USER_HOME("user.home"),

  /** User's current working directory. */
  USER_DIR("user.dir");

  private final String key;

        "Cannot create a file when that file already exists.", "All pipe instances are busy.", "The pipe is being closed.",
        "No process is on the other end of the pipe.", "More data is available.", "This user account has expired.",
        "The user is not allowed to log on from this workstation.", "The user is not allowed to log on at this time.",
        "The password of this user has expired.",
    };

    /**
     * This specialized method returns a Map of users and local groups for the
     * target server where keys are SIDs representing an account and each value
     * is an ArrayList of SIDs represents the local groups that the account is
     * a member of.
     * <p/>
     * This method is designed to assist with computing access control for a

  FILE_SEPARATOR("file.separator"),

  /** Path separator (":" on UNIX). */
  PATH_SEPARATOR("path.separator"),

  /** Line separator ("\n" on UNIX). */
  LINE_SEPARATOR("line.separator"),

  /** User's account name. */
  USER_NAME("user.name"),

  /** User's home directory. */
  USER_HOME("user.home"),

  /** User's current working directory. */
  USER_DIR("user.dir");

  private final String key;

import org.apache.maven.api.services.ModelProblemCollector;
import org.apache.maven.api.spi.ModelParserException;

/**
 * Collects problems that are encountered during model building. The primary purpose of this component is to account for
 * the fact that the problem reporter has/should not have information about the calling context and hence cannot provide

 * A mutable value of type {@code int}, for multisets to use in tracking counts of values.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
@ElementTypesAreNonnullByDefault
final class Count implements Serializable {
  private int value;

  Count(int value) {
    this.value = value;
  }

  public int get() {
    return value;
  }

  public void add(int delta) {
    value += delta;
  }