Document existing behaviour

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1304503 13f79535-47bb-0310-9956-ffa450edef68

Author: sebbASF

src/main/java/org/apache/commons/csv/CSVRecord.java

@@ -54,7 +54,9 @@ public String get(int i) {
     /**
      * Returns a value by name.
      *
-     * @param name the name of the column retrieved
+     * @param name the name of the column to be retrieved
+     * @return the column value, or {@code null} if the column name is not found
+     * @throws IllegalStateException if no header mapping was provided
      */
     public String get(String name) {
         if (mapping == null) {