converted field and method filters into lambdas

Author: ctrimble

src/main/java/org/bridj/StructFieldDeclaration.java

@@ -209,20 +209,10 @@ protected static ResolvedTypeWithMembers resolveType( Class<?> structClass ) {
       TypeResolver resolver = new TypeResolver();
       ResolvedType classType = resolver.resolve(structClass);
       MemberResolver mr = new MemberResolver(resolver);
-      mr.setMethodFilter(new Filter<RawMethod>() {
-        @Override
-        public boolean include( RawMethod method ) {
-          return 
+      mr.setMethodFilter(method->
             method.getRawMember().getParameterTypes().length < 2 &&
-            !method.isStatic();
-        }
-      });
-      mr.setFieldFilter(new Filter<RawField>() {
-        @Override
-        public boolean include( RawField field ) {
-          return !field.isStatic();
-        }
-      });
+            !method.isStatic());
+      mr.setFieldFilter(field->!field.isStatic());
       AnnotationConfiguration annConfig = new AnnotationConfiguration.StdConfiguration(AnnotationInclusion.INCLUDE_BUT_DONT_INHERIT);
       return mr.resolve(classType, annConfig, null);
     }