private static String getChartIdFromChildNodeAttributes(
            final NamedNodeMap attrs) {
        for (int j = 0; j < attrs.getLength(); j++) {
            Attr attribute = (Attr) attrs.item(j);
            if ("r:id".equalsIgnoreCase(attribute.getName())) {
                return attribute.getValue();
            }
        }
        return null;
    }
private static String getChartIdFromChildNodeAttributes ( final NamedNodeMap attrs ) { for ( int j = 0 ; j < attrs . getLength ( ) ; j ++ ) { Attr attribute = ( Attr ) attrs . item ( j ) ; if ( "r:id" . equalsIgnoreCase ( attribute . getName ( ) ) ) { return attribute . getValue ( ) ; } } return null ; }
Gets the chart id from child node attributes.

@param attrs
the attrs
@return the chart id from child node attributes