change precondition to validator
tree29db53ba810d3a11a65392a52f9d122e8d4c3d6a
-rwxr-xr-x 279 .editorconfig
-rwxr-xr-x 524 .gitattributes
drwxr-xr-x - .github
-rwxr-xr-x 4586 .gitignore
drwxr-xr-x - .idea
-rwxr-xr-x 168 .mailmap
-rw-r--r-- 1888 CONTRIBUTING.md
-rw-r--r-- 7048 LICENSE
-rw-r--r-- 1092 Makefile
-rw-r--r-- 807 README.md
drwxr-xr-x - dev
-rw-r--r-- 1044 maven-version-rules.xml
-rw-r--r-- 5060 pom.xml
-rw-r--r-- 618 project.mk
drwxr-xr-x - yosql-benchmarks
drwxr-xr-x - yosql-codegen
drwxr-xr-x - yosql-examples
drwxr-xr-x - yosql-internals
drwxr-xr-x - yosql-models
drwxr-xr-x - yosql-tooling
drwxr-xr-x - yosql-website