Gets a {@link CharSequence} with the given length at the given index.
@param length the length to read
@param charset that should be used
@return the sequence
@throws IndexOutOfBoundsException
if {@code length} is greater than {@code this.readableBytes}
Gets a {@link CharSequence} with the given length at the given index.
@param length the length to read @param charset that should be used @return the sequence @throws IndexOutOfBoundsException if {@code length} is greater than {@code this.readableBytes}