get_by_index(object, x)# S4 method for pmx_list,integer
get_by_index(object, x)
# S4 method for pmx_list,numeric
get_by_index(object, x)
# S4 method for compartment_properties,compartment_property
get_by_index(object, x)
# S4 method for parameters,parameter
get_by_index(object, x)