With two or more fitted models, anova() performs a sequential
likelihood-ratio comparison (like anova(glmer1, glmer2)). For a single
model, fixed-effect tests are routed to drop1() (term LRTs),
summary() (Wald z), or contrast() (custom Wald contrasts), which the
GLMM contract supports directly.
Usage
# S3 method for class 'mm_glmm'
anova(object, ...)