Transfers the specified source buffer's data to this buffer starting at
the current {@code writerIndex} and increases the {@code writerIndex}
by the number of the transferred bytes (= {@code length}).
If {@code this.writableBytes} is less than {@code length}, {@link #ensureWritable(int)}
will be called in an attempt to expand capacity to accommodate.
@param srcIndex the first index of the source
@param length the number of bytes to transfer
@throws IndexOutOfBoundsException
if the specified {@code srcIndex} is less than {@code 0}, or
if {@code srcIndex + length} is greater than {@code src.capacity}
Transfers the specified source buffer's data to this buffer starting at the current {@code writerIndex} and increases the {@code writerIndex} by the number of the transferred bytes (= {@code length}). If {@code this.writableBytes} is less than {@code length}, {@link #ensureWritable(int)} will be called in an attempt to expand capacity to accommodate.
@param srcIndex the first index of the source @param length the number of bytes to transfer
@throws IndexOutOfBoundsException if the specified {@code srcIndex} is less than {@code 0}, or if {@code srcIndex + length} is greater than {@code src.capacity}