code: @Nullable
    public static CSSDeclarationList readFromStream (@Nonnull final IHasInputStream aISP,
                                                     @Nonnull final Charset aCharset,
                                                     @Nonnull final ECSSVersion eVersion)
    {
      return readFromStream (aISP, aCharset, eVersion, null, null);
    }
docs: Read the CSS from the passed {@link IHasInputStream}.
  
  @param aISP
  The input stream provider to use. May not be <code>null</code>.
  @param aCharset
  The charset to be used. May not be <code>null</code>.
  @param eVersion
  The CSS version to use. May not be <code>null</code>.
  @return <code>null</code> if reading failed, the CSS declarations
  otherwise.