http://forum.soapui.org/viewtopic.php?t=19850
syntax highlighting or content assist inside soapUI?
to anyone who is thinking that if they install the Eclipse SoapUI plugin and then also install the latest Groovy plugin for Eclipse, the content assist will not work within that context, I can tell you that it doesn't work. You will have to create a separate Groovy project that includes the SoapUI dependencies in order for that to work. Then, you will need to manually copy code over into SoapUI (assuming you are are then NOT using the Eclipse SoapUI plugin).