Initializer
init(boundary:bufferCapacity:underlyingWriter:)
Creates a new buffered multipart writer.
init(boundary: String, bufferCapacity: Int, underlyingWriter: UnderlyingWriter)Parameters
boundaryThe boundary string to use for separating multipart parts.
bufferCapacityMaximum number of bytes to buffer before writing to the underlying writer.
underlyingWriterThe writer that will receive the buffered data when capacity is reached.