code: public void init(final Collection<String> localSchemaNames, final Map<String, Map<String, YamlDataSourceParameter>> schemaDataSources,
                       final Map<String, RuleConfiguration> schemaRules, final boolean isUsingRegistry) {
          databaseType = JDBCDriverURLRecognizerEngine.getDatabaseType(schemaDataSources.values().iterator().next().values().iterator().next().getUrl());
          initSchemas(localSchemaNames, schemaDataSources, schemaRules, isUsingRegistry);
      }
docs: Initialize proxy context.
  
  @param localSchemaNames local schema names
  @param schemaDataSources data source map
  @param schemaRules schema rule map
  @param isUsingRegistry is using registry or not