Appends the data from @buffer to @body. (#SoupMessageBody uses #SoupBuffers internally, so this is normally a constant-time operation that doesn't actually require copying the data in @buffer.)
a #SoupBuffer
See Implementation
Appends the data from @buffer to @body. (#SoupMessageBody uses #SoupBuffers internally, so this is normally a constant-time operation that doesn't actually require copying the data in @buffer.)