Return the governed SNIRF measurement list
Examples
pe <- PhysioNIRS:::.nirs_demo_object()
measurementList(pe)[, c("channel_label", "wavelength_nm")]
#> DataFrame with 4 rows and 2 columns
#> channel_label wavelength_nm
#> <character> <numeric>
#> 1 S1_D1_760 760
#> 2 S1_D1_850 850
#> 3 S2_D2_760 760
#> 4 S2_D2_850 850