no exprs function exported from flowWorkspace

[SamGG]

Describe the bug
I can use the method exprs on a cytoframe

To Reproduce

dataDir <- system.file("extdata",package="flowWorkspaceData")
files <- list.files(dataDir, "Cyto", full.names = TRUE)
library(flowWorkspace)
#> As part of improvements to flowWorkspace, some behavior of
#> GatingSet objects has changed. For details, please read the section
#> titled "The cytoframe and cytoset classes" in the package vignette:
#> 
#>   vignette("flowWorkspace-Introduction", "flowWorkspace")
cf <- load_cytoframe_from_fcs(files[1], num_threads = 4)
cf
#> cytoframe object 'CytoTrol_CytoTrol_1.fcs'
#> with 119531 cells and 12 observables:
#>        name         desc     range  minRange  maxRange
#> $P1   FSC-A           NA    262143         0    262143
#> $P2   FSC-H           NA    262143         0    262143
#> $P3   FSC-W           NA    262143         0    262143
#> $P4   SSC-A           NA    262143         0    262143
#> $P5  B710-A  CD4 PcpCy55    262143      -111    262143
#> ...     ...          ...       ...       ...       ...
#> $P8  V450-A     CD3 V450    262143      -111    262143
#> $P9  V545-A  HLA-DR V500    262143      -111    262143
#> $P10 G560-A      CCR7 PE    262143      -111    262143
#> $P11 G780-A CD45RA PECy7    262143      -111    262143
#> $P12   Time           NA    262143         0    262143
#> 199 keywords are stored in the 'description' slot
#> row names(0):
exprs(cf)
#> Error in `exprs()`:
#> ! could not find function "exprs"
sessionInfo()
#> R version 4.5.2 (2025-10-31 ucrt)
#> Platform: x86_64-w64-mingw32/x64
#> Running under: Windows 11 x64 (build 26200)
#> 
#> Matrix products: default
#>   LAPACK version 3.12.1
#> 
#> locale:
#> [1] LC_COLLATE=French_France.utf8  LC_CTYPE=French_France.utf8   
#> [3] LC_MONETARY=French_France.utf8 LC_NUMERIC=C                  
#> [5] LC_TIME=French_France.utf8    
#> 
#> time zone: Europe/Paris
#> tzcode source: internal
#> 
#> attached base packages:
#> [1] stats     graphics  grDevices utils     datasets  methods   base     
#> 
#> other attached packages:
#> [1] flowWorkspace_4.22.1
#> 
#> loaded via a namespace (and not attached):
#>  [1] Matrix_1.7-4          dplyr_1.2.0           compiler_4.5.2       
#>  [4] reprex_2.1.1          tidyselect_1.2.1      Biobase_2.70.0       
#>  [7] cytolib_2.22.0        Rgraphviz_2.54.0      IRanges_2.44.0       
#> [10] scales_1.4.0          yaml_2.3.12           fastmap_1.2.0        
#> [13] lattice_0.22-9        XVector_0.50.0        R6_2.6.1             
#> [16] RProtoBufLib_2.22.0   S4Arrays_1.10.1       generics_0.1.4       
#> [19] knitr_1.51            BiocGenerics_0.56.0   XML_3.99-0.22        
#> [22] graph_1.88.1          DelayedArray_0.36.0   tibble_3.3.1         
#> [25] MatrixGenerics_1.22.0 RColorBrewer_1.1-3    pillar_1.11.1        
#> [28] ncdfFlow_2.56.0       rlang_1.1.7           flowCore_2.22.1      
#> [31] xfun_0.56             fs_1.6.6              otel_0.2.0           
#> [34] SparseArray_1.10.8    cli_3.6.5             withr_3.0.2          
#> [37] magrittr_2.0.4        digest_0.6.39         grid_4.5.2           
#> [40] rstudioapi_0.18.0     lifecycle_1.0.5       S4Vectors_0.48.0     
#> [43] vctrs_0.7.1           evaluate_1.0.5        glue_1.8.0           
#> [46] data.table_1.18.2.1   farver_2.1.2          abind_1.4-8          
#> [49] stats4_4.5.2          rmarkdown_2.30        matrixStats_1.5.0    
#> [52] tools_4.5.2           pkgconfig_2.0.3       htmltools_0.5.9

^{Created on 2026-04-17 with reprex v2.1.1}

Expected behavior
I should view the expression intensities.

Additional context
The previous code is working if flowCore is loaded, but doing so makes me unclear of the underlying transformation: the cytoframe is converted to a flowFrame, then exprs is applied?