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| 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 |