+ * Answers true if this store contains the given feature (testing by
+ * SequenceFeature.equals), else false
+ *
+ * @param feature
+ * @return
+ */
+ public boolean contains(SequenceFeature feature)
+ {
+ if (feature.isNonPositional())
+ {
+ return nonPositionalFeatures == null ? false : nonPositionalFeatures
+ .contains(feature);
+ }
+
+ if (feature.isContactFeature())
+ {
+ return contactFeatureStarts == null ? false : listContains(
+ contactFeatureStarts, feature);
+ }
+
+ if (listContains(nonNestedFeatures, feature))
+ {
+ return true;
+ }
+
+ return nestedFeatures == null ? false : nestedFeatures
+ .contains(feature);
+ }
+
+ /**