Convert various codes to their associated names.
Examples
parent("21AE26")
#> ✖ 21AE26 (a <medicaid> object) has no <parent> unit.
parent("21SE26")
#> <ccn::Medicare>
#> @ ccn : chr "213326"
#> @ state : <ccn::State>
#> .. @ abbr : chr "MD"
#> .. @ name : chr "Maryland"
#> .. @ region: chr "III"
#> .. @ office: chr "Philadelphia"
#> @ range : <ccn::RangeMCR>
#> .. @ series: chr "3300-3399"
#> .. @ abbr : chr "CH"
#> .. @ desc : chr "Children's Hospital"
#> .. @ eipps : logi TRUE
#> @ extension: chr NA
parent("21SB26")
#> <ccn::Medicare>
#> @ ccn : chr "212126"
#> @ state : <ccn::State>
#> .. @ abbr : chr "MD"
#> .. @ name : chr "Maryland"
#> .. @ region: chr "III"
#> .. @ office: chr "Philadelphia"
#> @ range : <ccn::RangeMCR>
#> .. @ series: chr "2000-2299"
#> .. @ abbr : chr "LTCH"
#> .. @ desc : chr "Long-Term Care Hospital"
#> .. @ eipps : logi TRUE
#> @ extension: chr NA
parent("21SD26")
#> <ccn::Medicare>
#> @ ccn : chr "213026"
#> @ state : <ccn::State>
#> .. @ abbr : chr "MD"
#> .. @ name : chr "Maryland"
#> .. @ region: chr "III"
#> .. @ office: chr "Philadelphia"
#> @ range : <ccn::RangeMCR>
#> .. @ series: chr "3025-3099"
#> .. @ abbr : chr "IRF"
#> .. @ desc : chr "Rehabilitation Hospital"
#> .. @ eipps : logi TRUE
#> @ extension: chr NA