Exception in thread "main" org.bjv2.util.ServiceConfigurationError: Can't locate a SPI for interface org.bjv2.gql.PropertyFetcher for proptery 'feature' on interface org.bjv2.seq.FeatureRelation at org.bjv2.gql.Follows.followProperty(Follows.java:117) at org.bjv2.gql.Follows.followProperties(Follows.java:207) at org.bjv2.gql.Filters.on(Filters.java:177) at org.bjv2.integrator.Query.build(Query.java:94) at org.bjv2.integrator.impl.AbstractIntegrator.processMapping(AbstractIntegrator.java:311) at org.bjv2.integrator.impl.AbstractIntegrator.access$000(AbstractIntegrator.java:22) at org.bjv2.integrator.impl.AbstractIntegrator$SingletonInvocationHandler.invoke(AbstractIntegrator.java:540) at org.bjv2.integrator.impl.AbstractIntegrator$CachingInvocationHandler.invoke(AbstractIntegrator.java:494) at $Proxy9.getRelations(Unknown Source) at bio.FlyMineToBJv2.toString(FlyMineToBJv2.java:176) at bio.FlyMineToBJv2.main(FlyMineToBJv2.java:213) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:585) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:78)@Identifier("urn:biojava.org:integratorContext/sequence:relations")@Properties({@Property(property = "source", plan = MergeStrategy.FIRST_VALUE, identifier = "urn:biojava.org:integratorContext/sequence:features"), @Property(property = "type", plan = MergeStrategy.FIRST_VALUE) })public interface FeatureRelation { public Feature getSource(); public String getType();}@PrimaryKey({"identifier"})@Identifier("urn:biojava.org:integratorContext/sequence:features")@Properties({@Property(property = "locators", plan = MergeStrategy.MERGE, query = "locators feature == this", identifier = "urn:biojava.org:integratorContext/sequence:locators"), @Property(property = "relations", plan = MergeStrategy.MERGE, query = "relations feature == this", identifier = "urn:biojava.org:integratorContext/sequence:relations"), @Property(property = "annotation", plan = MergeStrategy.MERGE), @Property(property = "identifier", plan = MergeStrategy.FIRST_VALUE), @Property(property = "type", plan = MergeStrategy.FIRST_VALUE) })public interface Feature extends Annotatable, Identifiable{ public FeatureType getType(); public Set<Locator> getLocators(); public Set<FeatureRelation> getRelations();}