Add the 'clear receivers' command

src/org/graphstream/gama/extension/IKeywordGSAdditional.java

@@ -22,6 +22,7 @@ public class IKeywordGSAdditional implements IKeyword {
 	public static final String STEP = "gs_step";
 		//Receiver command
 	public static final String ADD_RECEIVER = "gs_add_receiver";
+	public static final String CLEAR_RECEIVERS = "gs_clear_receivers";
 	public static final String GET_EDGE_ATTRIBUTE = "gs_get_edge_attribute";
 	public static final String GET_NODE_ATTRIBUTE = "gs_get_node_attribute";
 	public static final String GET_GRAPH_ATTRIBUTE = "gs_get_graph_attribute";

src/org/graphstream/gama/extension/receiver/ClearReceiversStatement.java

+package org.graphstream.gama.extension.receiver;
+
+import msi.gama.precompiler.ISymbolKind;
+import msi.gama.precompiler.GamlAnnotations.inside;
+import msi.gama.precompiler.GamlAnnotations.symbol;
+import msi.gama.runtime.IScope;
+import msi.gama.runtime.exceptions.GamaRuntimeException;
+import msi.gaml.descriptions.IDescription;
+import msi.gaml.statements.AbstractStatement;
+import msi.gaml.statements.IStatement;
+
+import org.graphstream.gama.extension.GSManager;
+import org.graphstream.gama.extension.IKeywordGSAdditional;
+
+@symbol(name = IKeywordGSAdditional.CLEAR_RECEIVERS, kind = ISymbolKind.SINGLE_STATEMENT, with_sequence = false)
+@inside(kinds = { ISymbolKind.BEHAVIOR, ISymbolKind.SINGLE_STATEMENT })
+public class ClearReceiversStatement extends AbstractStatement implements IStatement{
+	
+	public ClearReceiversStatement(IDescription desc) {
+		super(desc);
+	}
+
+	@Override
+	protected Object privateExecuteIn(IScope scope) throws GamaRuntimeException {
+		GSManager.clearReceivers();
+		return null;
+	}
+
+	
+}