The fixed-effect estimates as one named numeric vector, named
<arm>_<term> as stats::vcov() and stats::confint() name them: psi_(Intercept),
p_det_cov1, lambda_elev, ... The visit-level detection coefficients
(p_visit_<cov>) belong to the detection arm. A coordinate that enters no
single arm, such as the log_r overdispersion, keeps its own name.
Usage
# S3 method for class 'tobs_fit'
coef(object, arm = NULL, ...)