convert_to_sf           convert_to_sf
get_string_type         get_string_type
materialize             materialize
random_strings          random_strings
sf_assign               sf_assign
sf_collapse             sf_collapse
sf_grepl                sf_grepl
sf_gsub                 sf_gsub
sf_iconv                sf_iconv
sf_nchar                sf_nchar
sf_paste                sf_paste
sf_readLines            sf_readLines
sf_substr               sf_substr
sf_vector               sf_vector
