class Concatenate extends OperatorProcessor
{
    public Concatenate(PDFStreamEngine context)
    {
        super(context);
    }

    @Override
    public void process(Operator operator, List<COSBase> arguments) throws IOException
    {<FILL_FUNCTION_BODY>}

    @Override
    public String getName()
    {
        return OperatorName.CONCAT;
    }
}

        if (arguments.size() < 6)
        {
            throw new MissingOperandException(operator, arguments);
        }
        if (!checkArrayTypesClass(arguments, COSNumber.class))
        {
            return;
        }
        
        // concatenate matrix to current transformation matrix
        COSNumber a = (COSNumber) arguments.get(0);
        COSNumber b = (COSNumber) arguments.get(1);
        COSNumber c = (COSNumber) arguments.get(2);
        COSNumber d = (COSNumber) arguments.get(3);
        COSNumber e = (COSNumber) arguments.get(4);
        COSNumber f = (COSNumber) arguments.get(5);

        Matrix matrix = new Matrix(a.floatValue(), b.floatValue(), c.floatValue(),
                                   d.floatValue(), e.floatValue(), f.floatValue());

        getContext().getGraphicsState().getCurrentTransformationMatrix().concatenate(matrix);
    
<methods>public boolean checkArrayTypesClass(List<org.apache.pdfbox.cos.COSBase>, Class<?>) ,public abstract java.lang.String getName() ,public abstract void process(org.apache.pdfbox.contentstream.operator.Operator, List<org.apache.pdfbox.cos.COSBase>) throws java.io.IOException<variables>private final non-sealed org.apache.pdfbox.contentstream.PDFStreamEngine context