anchor.diff:  [source,java]
   ----
   import org.apache.spark.sql.api.java.JavaSQLContext;          <1>
  -import org.elasticsearch.spark.sql.java.api.JavaEsSpark SQL;   <2>
  +import org.elasticsearch.spark.sql.java.api.JavaEsSparkSQL;   <2>
   ...
   SQLContext sql = new SQLContext(sc);
   
  
positive.code: 
  val sql = new SQLContext(sc)
  
  val people = sql.esDF("spark/people") <3>
  
  // check the associated schema
  println(people.schema.treeString)             <4>
  
negative.code: [source,java]
  ----
  import org.apache.spark.sql.api.java.JavaSQLContext;               <1>
  import org.elasticsearch.spark.sql.java.api.JavaEsSparkSQL;        <2>
  ...
  JavaSQLContext jsql = new JavaSQLContext(sc);
  
  