Convert the given Object to serialized form, possibly using a
{@link MessageConverter}, wrap it as a message with the given
headers and apply the given post processor.
@param payload the Object to use as payload
@param headers headers for the message to send
@param postProcessor the post processor to apply to the message
@return the converted message
Convert the given Object to serialized form, possibly using a {@link MessageConverter}, wrap it as a message with the given headers and apply the given post processor. @param payload the Object to use as payload @param headers headers for the message to send @param postProcessor the post processor to apply to the message @return the converted message