Data Binding to the Table error is not a fucntion - sapui5

Question

I have problem with binding the OData to the table. When i define a function in js file it says "is not a function"
odata.js
getBoM : function(iNumber){
var sNumber = iNumber.toString();
while (sNumber.length < 18) {
sNumber = "0" + sNumber
}
var vUriRead = "/ProductHeadSet('12345')/ProductHead2BOM";
var oResult;
this.initODataModel( );
this.oDataModel.read(vUriRead, null, null, false, function(oData, oResponse) {
oResult = oData;
}, function(oError) {
jQuery.sap.log.error("OData-Error in function getBoM (EntityBoMSet)");
xyz_homepage.xyz_homepage.src.odata.displayRequestFailedMessage(oError);
});
return oResult;
},
Controller.js
var oProductHead2BoM = xyz_homepage.xyz_homepage.src.odata.getBoM(iNumber);
this.oModelProductHead2BoM.setData(oProductHead2BoM);
at the .getBoM(iNumber) it says, "Uncaught TypeError: xyz_homepage.xyz_homepage.src.odata.getBoM is not a function"
Edit :
controller.js
handleRouteMatched : function(oEvent) {
if (oEvent.getParameter("name") === "page") {
var iNumber = oEvent.getParameter("arguments").number;
var oDataResult = xyz_homepage.xyz_homepage.src.odata
.getDetailsProd(iNumber);
this.oModelProdManag.setData(oDataResult);
var aDocuments = xyz_homepage.xyz_homepage.src.odata.getDocumentsProd(iNumber);
this.oModelDocuments.setData(aDocuments);
//Call bom routine and set data
var oProductHead2BoM = xyz_homepage.xyz_homepage.src.odata.getProductHead2BOM(iNumber);
this.oModelProductHead2BoM.setData(oProductHead2BoM);
So when i debug and click on function ".getDocumentsProd" i can find the function which is reference to odata.js
Odata.js
getDocumentsProd Function
getDocumentsProd : function(iNumber){
var sNumber = iNumber.toString();
while (sNumber.length < 18) {
sNumber = "0" + sNumber
}
var vUriRead = "/DocumentsSet/?$filter=Material%20eq%20'" + sNumber + "'";
var oResult;
this.initODataModel( );
this.oDataModel.read(vUriRead, null, null, false, function(oData, oResponse) {
oResult = oData.results;
}, function(oError) {
jQuery.sap.log.error("OData-Error in function getDocumentsProd (EntityDocumentsSet)");
xyz_homepage.xyz_homepage.src.odata.displayRequestFailedMessage(oError);
});
return oResult;
},
On the same note i have for the getProductHead2BOM function.
getProductHead2BOM : function(iNumber){
var sNumber = iNumber.toString();
while (sNumber.length < 18) {
sNumber = "0" + sNumber
}
var vUriRead = "/ProductHeadSet('5199182')/ProductHead2BOM";
var oResult;
this.initODataModel( );
this.oDataModel.read(vUriRead, null, null, false, function(oData, oResponse) {
oResult = oData;
}, function(oError) {
jQuery.sap.log.error("OData-Error in function getProductHead2BOM (EntityProductHead2BOM)");
zplm_homepage.zplm_homepage.src.odata.displayRequestFailedMessage(oError);
});
return oResult;
}
I could see documents Odata but not for ProductsHeadBom