StringUtils
replace
replace_all
replace_all_str
find_first
find_fst_from
find_str
find_str_from
substr
get_ch_at
positions
indicesOfSubStr
count
isIn
delete_at
delete_all
insert_at
to_upper
to_lower
fst_pos_lst
matching_lst
trim_left
trim_left_complete
trim_right
trim_right_complete
trim
trim_complete