Move some _ArgumentContainer methods around
Move some _ArgumentContainer methods around

cjdrake/pyeda,pombredanne/pyeda,GtTmy/pyeda,sschnug/pyeda,cjdrake/pyeda,karissa/pyeda,sschnug/pyeda,sschnug/pyeda,pombredanne/pyeda,karissa/pyeda,karissa/pyeda,GtTmy/pyeda,cjdrake/pyeda,pombredanne/pyeda,GtTmy/pyeda