--- /dev/null
+package org.simantics.scl.commands.internal.checker;\r
+\r
+import java.util.List;\r
+\r
+import org.simantics.scl.compiler.types.Type;\r
+\r
+/**\r
+ * Internal object used in the implementation of Checker for\r
+ * doing one checking step.\r
+ * \r
+ * @author Hannu Niemistö\r
+ */\r
+public interface CheckItem {\r
+ boolean check(Object check, Object[] parameters, int pos);\r
+ void collectParameterTypes(List<Type> types);\r
+}\r