insertText
open fun insertText(position: <Error class: unknown class>, chars: String, nChars: Int): <Error class: unknown class>
Inserts @n_chars characters of @chars into the contents of the buffer, at position @position.
If @n_chars is negative, then characters from chars will be inserted until a null-terminator is found. If @position or @n_chars are out of bounds, or the maximum buffer text length is exceeded, then they are coerced to sane values.
Note that the position and length are in characters, not in bytes.
Return
The number of characters actually inserted.
Parameters
position
the position at which to insert text.
chars
the text to insert into the buffer.
nChars
the length of the text in characters, or -1