add function to get the previous sibling element from an XML node
add function to get the previous sibling element from an XML node

FokkeZB/alloy,4talesa/alloy,FokkeZB/alloy,indera/alloy,NadsonFernando/alloy,brentonhouse/brentonhouse.alloy,xavierlacot/alloy,indera/alloy,xavierlacot/alloy,NadsonFernando/alloy,brentonhouse/brentonhouse.alloy,WY08271/alloy,jvkops/alloy,mobilehero/adamantium,mobilehero/adamantium,4talesa/alloy,mobilehero/adamantium,bhatfield/alloy,WY08271/alloy,xavierlacot/alloy,4talesa/alloy,NadsonFernando/alloy,indera/alloy,FokkeZB/alloy,bhatfield/alloy,bhatfield/alloy,jvkops/alloy,brentonhouse/brentonhouse.alloy,jvkops/alloy,WY08271/alloy