1 files changed, 5 insertions, 2 deletions
diff --git a/src/source.rs b/src/source.rs
index 95785a6..1a8d08f 100644
--- a/src/source.rs
+++ b/src/source.rs
@@ -1,8 +1,11 @@
 use std::error::Error;
-use std::collections::HashMap;
 
 use value::Value;
 
 pub trait Source {
-    fn build(&mut self) -> Result<HashMap<String, Value>, Box<Error>>;
+    fn get(&self, key: &str) -> Option<Value>;
+}
+
+pub trait SourceBuilder {
+    fn build(&self) -> Result<Box<Source>, Box<Error>>;
 }