Sketch for cluster's api.
Refactoring for first paragraph
Refactoring for second  paragraph
Refactoring for 3 paragraph
Check addition
Cluster of filters
Clusters contexts
Cluster of vars
Cluster of vars
Cluster of vars
Cluster of vars
Cluster of vars
Cluster of vars
Cluster of vars
Cluster of vars
Merge branch 'feature/cluster-api' into develop