public static String createRootVariable(Path<?> path, int suffix) {
        String variable = path.accept(ToStringVisitor.DEFAULT, TEMPLATES);
        return variable + "_" + suffix;
    }
Create a new root variable based on the given path and suffix

@param path base path
@param suffix suffix for variable name
@return path expression
querydsl-core/src/main/java/com/querydsl/core/types/ExpressionUtils.java