@Nullable
  public static Key getKeyOfID (@Nonnull final ColumnSet aColumnSet, @Nullable final String sID)
  {
    if (sID != null)
      for (final Key aKey : getAllKeys (aColumnSet))
        if (aKey.getId ().equals (sID))
          return aKey;
    return null;
  }
@Nullable
  public static Key getKeyOfID (@Nonnull final ColumnSet aColumnSet, @Nullable final String sID)
  {
    if (sID != null)
      for (final Key aKey : getAllKeys (aColumnSet))
        if (aKey.getId ().equals (sID))
          return aKey;
    return null;
  }
@ Nullable public static Key getKeyOfID ( @ Nonnull final ColumnSet aColumnSet , @ Nullable final String sID ) { if ( sID != null ) for ( final Key aKey : getAllKeys ( aColumnSet ) ) if ( aKey . getId ( ) . equals ( sID ) ) return aKey ; return null ; }
Get the key with the specified ID.

@param aColumnSet
The column set to scan. May not be <code>null</code>.
@param sID
The ID to search. May be <code>null</code>.
@return <code>null</code> if no such key exists.
Get the key with the specified ID .