homogen_power           Compute Power for Test of Homogeneity in
                        Meta-analysis
mod_power               Compute Power for Categorical Moderator
                        Analysis in Meta-analysis
mpower                  Compute Power for Meta-analysis
plot_homogen_power      Plot Power Curve for Test of Homogeneity
plot_mod_power          Plot Power Curve for Categorical Moderators
plot_mpower             Plot Power Curve for Meta-analysis
plot_subgroup_power     Plot Power Curve for Subgroup analysis
subgroup_power          Compute Power for Subgroup Analysis in
                        Meta-analysis
