#include EXPORT s32 string_first_ch(String string, u8 ch); EXPORT s64 string_last_ch(String string, u8 ch); EXPORT u8 string_starts_with(String string, String start); EXPORT u8 string_ends_with(String string, String end); EXPORT u64 string_first_ocurrence(String string, String substring); EXPORT u64 string_last_ocurrence(String string, String substring);