Returns {@code true} if and only if the two specified buffers are
identical to each other for {@code length} bytes starting at {@code aStartIndex}
index for the {@code a} buffer and {@code bStartIndex} index for the {@code b} buffer.
A more compact way to express this is:
<p>
{@code a[aStartIndex : aStartIndex + length] == b[bStartIndex : bStartIndex + length]}
boolequals(ByteBuf a, int aStartIndex, ByteBuf b, int bStartIndex, int length)
Returns {@code true} if and only if the two specified buffers are identical to each other for {@code length} bytes starting at {@code aStartIndex} index for the {@code a} buffer and {@code bStartIndex} index for the {@code b} buffer. A more compact way to express this is: <p> {@code a[aStartIndex : aStartIndex + length] == b[bStartIndex : bStartIndex + length]}