Here you find the guide for the manual installation of Z_XTRACT_IS_TABLE.
Step 1 - Create a new function module
Call transaction SE37 and create a new function module named Z_XTRACT_IS_TABLE. You can use an existing function group or create a new one. This is also valid for the development class (Package). In tab Attributes check Remote Enabled.
Step 2 - ImportParameter
Define the imports as shown in the screenshot.
Step 3 - Tables Parameter
Define the tables as shown in the screenshot.
Step 4 - Exception Define the exceptions as shown in the screenshot.
Step 5 - Code
You can find the ABAP code in Z_XTRACT_IS_TABLE.txt. Use Ctrl + C and Ctrl + V to paste the code in the source code editor. Save the function module and activate it.
You can use the transport request (thtrans.zip), that can be found in the ABAP subfolder of the installation folder, to install the function module. For more detail information about installing the transport request please read the following Knowledgebase article or check the SAP help.