Add methods to add SpecifiedProcuringProject

library/src/main/java/org/mustangproject/Invoice.java

@@ -49,7 +49,12 @@ public class Invoice implements IExportableTransaction {
 	protected ArrayList<IZUGFeRDAllowanceCharge> Allowances = new ArrayList<>(),
 			Charges = new ArrayList<>(), LogisticsServiceCharges = new ArrayList<>();
 	protected IZUGFeRDPaymentTerms paymentTerms = null;
-  private Date invoiceReferencedIssueDate;
+	private Date invoiceReferencedIssueDate;
+	private String specifiedProcuringProjectID = null;
+
+  
+
+	private String specifiedProcuringProjectName = null;
 
   public Invoice() {
 		ZFItems = new ArrayList<>();
@@ -647,4 +652,23 @@ public class Invoice implements IExportableTransaction {
 		return this;
 	}
 
+	@Override
+	public String getSpecifiedProcuringProjectID() {
+		return specifiedProcuringProjectID;
+	}
+
+	public Invoice setSpecifiedProcuringProjectID(String specifiedProcuringProjectID) {
+		this.specifiedProcuringProjectID = specifiedProcuringProjectID;
+		return this;
+	}
+
+	@Override
+	public String getSpecifiedProcuringProjectName() {
+		return specifiedProcuringProjectName;
+	}
+
+	public Invoice setSpecifiedProcuringProjectName(String specifiedProcuringProjectName) {
+		this.specifiedProcuringProjectName = specifiedProcuringProjectName;
+		return this;
+	}
 }