add concinient methods to Increment/InitializeVisitor
add concinient methods to Increment/InitializeVisitor

aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust