nstantiate
 an IndexSchema.

 If the managed schema file can't be found, the resource named by the resourceName
 parameter is used to instantiate an IndexSchema.

 Once the IndexSchema is instantiated, if the managed schema file does not exist,
 the instantiated IndexSchema is persisted to the managed schema file named in the
 managedSchemaResourceName param, in the directory given by 
 <a href="../../../../org/apache/solr/core/SolrResourceLoader.html#getConfigDir()"><code>SolrResourceLoader.getConfigDir()<