An object of the class FormalGroupLaw is a FormalSeries in two variables.
The object FormalGroupLaw is a type, with ancestor classes FormalSeries < BasicList < Thing.
The source of this document is in /build/macaulay2-88fgJW/macaulay2-1.25.11+ds/M2/Macaulay2/packages/FormalGroupLaws.m2:727:0.