Perform the bandwidth field parsing
lexer.match('b");
lexer.SPorHT();
lexer.match('=");
lexer.SPorHT();
BandwidthField bandwidthField = new BandwidthField();
NameValue nameValue = nameValue(':");
String name = nameValue.getName();
String value = (String) nameValue.getValue();
bandwidthField.setBandwidth(Integer.parseInt(value.trim()));
bandwidthField.setBwtype(name);
lexer.SPorHT();
return bandwidthField;