Function yrs::ytext_remove_range

#[no_mangle]
pub unsafe extern "C" fn ytext_remove_range(
    txt: *const Text, 
    txn: *mut Transaction, 
    index: c_int, 
    length: c_int
)

Removes a range of characters, starting a a given index. This range must fit within the bounds of a current YText, otherwise this function call will fail.

An index value must be between 0 and the length of a YText (exclusive, accordingly to ytext_len return value).

A length must be lower or equal number of bytes (internally YText uses UTF-8 encoding) from index position to the end of of the string.