.sanityCheck            Sanity check if one and only file with the
                        specified name pattern exists in the data
                        download directory, and return the file path to
                        .csv Used for count matrix and metadata only,
                        as they require unique.
addParquetPathToMeta    Add parquet paths to metadata for transcripts,
                        polygon, or cell/nucleus boundaries.
addParquetPathsCosmx    Add CosMx-related parquet paths to metadata for
                        transcripts, polygon, or cell/nucleus
                        boundaries.
addParquetPathsXenium   Add Xenium-related parquet paths to metadata
                        for transcripts or cell/nucleus boundaries.
csvToParquetPaths       If transcripts or polygon is expected to be
                        loaded, write a parquet file to the current
                        data download (if not already), and return the
                        file path to .parquet
readCosmxSXE            Load data from a Nanostring CosMx experiment
readMerscopeSXE         Load data from a Vizgen MERSCOPE experiment
readSeqfishSXE          Load data from a Spatial Genomics seqFISH
                        experiment
readStarmapplusSXE      Load data from a STARmap PLUS experiment
readXeniumSXE           Load data from a 10x Geonomics Xenium
                        experiment
