GLMInternalStages[glm]
returns the number of internal stages in glm.
The number of internal stages for a generic general linear method:
GLM GLMA GLMB GLMU GLMV GLMQ GLMC GLMExternalStages GLMP
![A in TemplateBox[{}, Reals]^(sxs)](Files/GLMInternalStages.en/2.png "A in TemplateBox[{}, Reals]^(sxs)"){kind=small}
![U in TemplateBox[{}, Reals]^(sxr)](Files/GLMInternalStages.en/3.png "U in TemplateBox[{}, Reals]^(sxr)"){kind=small}
![c in TemplateBox[{}, Reals]^s](Files/GLMInternalStages.en/4.png "c in TemplateBox[{}, Reals]^s"){kind=small}