Function yxmltext_remove_range 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn yxmltext_remove_range(
    txt: *const Branch,
    txn: *mut Transaction,
    idx: u32,
    len: u32,
)

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

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

A length must be lower or equal number of characters (counted as UTF chars depending on the encoding configured by YDoc) from index position to the end of of the string.