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
