public EntitiesConfigurations(Map entitiesConfigurations) 
{
        
        this.entitiesConfigurations = entitiesConfigurations;
        generateBidirectionRelationInfo();
        generateVersionsEntityToEntityNames();
}

 public EntityConfiguration get(String entityName) 
{
        return entitiesConfigurations.get(entityName);
}

 public String getEntityNameForVersionsEntityName(String versionsEntityName) 
{
        return entityNamesForVersionsEntityNames.get(versionsEntityName);
}

 public RelationDescription getRelationDescription(String entityName,
    String propertyName) 
{
        EntityConfiguration entCfg = entitiesConfigurations.get(entityName);
        RelationDescription relDesc = entCfg.getRelationDescription(propertyName);
        if (relDesc != null) {
            return relDesc;
        } else if (entCfg.getParentEntityName() != null) {
            // The field may be declared in a superclass ...
            return getRelationDescription(entCfg.getParentEntityName(), propertyName);
        } else {
            return null;
        }
}

 public boolean isVersioned(String entityName) 
{
        return get(entityName) != null;
}