m4_dnl`'m4_divert(-1)

m4_define(maxB,  `Breaks[$1,0]')
m4_define(maxBV,  `Breaks[$1,Breaks[$1,0]]')
m4_define(minB,  `Breaks[$1,Breaks[$1,1]]')
m4_define(pushBKV, `Breaks[$1,++Breaks[$1,0]]=$2')

m4_dnl`'m4_divert(1)