+ added value converter for EString to ensure strings are enclosed in quotes

package org.etsi.mts.tdl;

import org.eclipse.xtext.common.services.Ecore2XtextTerminalConverters;

import org.eclipse.xtext.conversion.IValueConverter;

import org.eclipse.xtext.conversion.ValueConverter;

import org.eclipse.xtext.conversion.impl.AbstractNullSafeConverter;

import org.eclipse.xtext.nodemodel.INode;

public class EString2XtextConverter extends Ecore2XtextTerminalConverters {

	@ValueConverter(rule = "EString")

	public IValueConverter<String> EString() {

		return new AbstractNullSafeConverter<String>() {

			@Override

			protected String internalToValue(String string, INode node) {

				return STRING().toValue(string, node);

			}

			@Override

			protected String internalToString(String value) {

				return STRING().toString(value);

			}

		};

	}

}

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