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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def dumps(mesh):
    '''
    Generates a UTF-8 XML string containing the mesh, in collada format.
    '''
    from lxml import etree

    dae = mesh_to_collada(mesh)

    # Update the xmlnode.
    dae.save()

    return etree.tostring(dae.xmlnode, encoding='UTF-8')