Add list getter methods.

Author: gemmaro

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## Unreleased
 
+- Add `GettextPO::Message#sticky_flags`,
+  `GettextPO::Message#workflow_flags`, and `GettextPO::File#messages`
+  methods.
 - Enable file each message method, message iterator each method flag
   iterator each method, message each sticky flag method, and message
   each workflow flag method to run without given block.

mrblib/mrb_gettextpo_common.rb

@@ -98,6 +98,10 @@ def each_sticky_flag
       end
     end
 
+    def sticky_flags
+      each_sticky_flag.to_a
+    end
+
     # call-seq:
     #   each_workflow_flag { |flag| ... }
     #   each_workflow_flag -> Enumerator
@@ -113,6 +117,10 @@ def each_workflow_flag
         end
       end
     end
+
+    def workflow_flags
+      each_workflow_flag.to_a
+    end
   end
 
   class File
@@ -131,6 +139,10 @@ def each_message(domain = nil)
         end
       end
     end
+
+    def messages(domain = nil)
+      each_message(domain).to_a
+    end
   end
 
   # This class doesn't provide the +new+ class method.  See also