null,
    public JStatement makeTimeToFrequencyConversion(JVariableDefinition fieldToConvert,						    int filterSize) {	// now, add in a callout to convert_to_freq to transform the real weights into	// their complex form.	// prep the args	JExpression[] externalArgs = new JExpression[2];	externalArgs[0] = new JFieldAccessExpression(null, new JThisExpression(null),						     fieldToConvert.getIdent());	externalArgs[1] = new JIntLiteral(filterSize);	JExpression externalCall = new JMethodCallExpression(null,               /* token reference*/							     null,               /* prefix */							     TO_FREQ_EXTERNAL,   /* ident */							     externalArgs);      /* args */	JavaStyleComment[] comment = makeComment("callout to " + TO_FREQ_EXTERNAL +						 " to convert from time to freq. "); 	return new JExpressionStatement(null,externalCall,comment);               }