ExternalMap[](User Defined Function) SAD Functions Manual
ExternalMap[] - User Defined Map Function for MAP Elements
ExternalMap["TRACK", n, nt_, x_] := (user defined function returns x1);
ExternalMap["EMIT", n, cod_] := (user defined function returns {cod1, trans} or {cod1, trans, dtrans, dbeam});
ExternalMap["OPTICS", n, cod_] := (user defined function returns {cod1, trans});
ExternalMap["GEO", n, geo_, pos_] := (user defined function returns {geo1, pos1});
FFS/SADScript Levelから Beam Line上に挿入されたMAPエレメントの 実体を定義する.