hlm_context             Contextual effect for a Level-1 predictor
                        (Mundlak decomposition)
hlm_context_plot        Convenience wrapper to plot contextual effects
hlm_decompose           Multilevel variance decomposition
                        (within/between/longitudinal)
hlm_decompose_long      Longitudinal three-level variance decomposition
                        (B-P-W)
hlm_icc                 Intraclass correlation and design effect from a
                        random-intercept model
hlm_icc_plot            Teaching plot for intraclass correlation (ICC)
hlm_xint_geom           Geometry of a cross-level interaction (random
                        slopes fan plot)
plot.hlm_context        Plot method for hlm_context objects
plot.hlm_decompose      Plot method for hlm_decompose objects
