This assumes you are familiar with the basic usage of the Gateway Migration Utility. Following is an example of how to list every encapsulated assertion in an API Gateway.

/path/to/GatewayMigrationUtility.sh restman
-host apig.example.com
-port 8443
-username john.doe
-password f5VPX0yUJPg.m4BrjdgMv84UgktddJD3xA
-method GET
-path '1.0/encapsulatedAssertions'

Or the -argFile option can be used, to reduce the number of options that are used on the command line.

/path/to/GatewayMigrationUtility.sh restman
-argFile example.properties
-method GET
-path '1.0/encapsulatedAssertions'

Or, you can return a single encapsulated assertion by including the ID of the encapsulated assertion.

/path/to/GatewayMigrationUtility.sh restman
-argFile example.properties
-method GET
-path '1.0/encapsulatedAssertions/fa003c1f2478cc407b0a8acbba2aa199'

Or, you can use the -query option to return a single encapsulated assertion by including the name of the encapsulated assertion.

/path/to/GatewayMigrationUtility.sh restman
-argFile example.properties
-method GET
-path '1.0/encapsulatedAssertions'
-query 'name=assertion001'

The -response option can be used to output the XML to a file.

/path/to/GatewayMigrationUtility.sh restman
-argFile example.properties
-method GET
-path '1.0/encapsulatedAssertions'
-response /path/to/example.xml

Here is an example of the output that could be returned.

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<l7:List xmlns:l7="http://ns.l7tech.com/2010/04/gateway-management">
    <l7:Name>ENCAPSULATED_ASSERTION List</l7:Name>
    <l7:Type>List</l7:Type>
    <l7:TimeStamp>2021-01-05T21:59:45.724-06:00</l7:TimeStamp>
    <l7:Link rel="self" uri="https://apig.example.com:8443/restman/1.0/encapsulatedAssertions?name=assertion001"/>
    <l7:Link rel="template" uri="https://apig.example.com:8443/restman/1.0/encapsulatedAssertions/template"/>
    <l7:Item>
        <l7:Name>assertion001</l7:Name>
        <l7:Id>f380d7b766f92ef13d6238d1c0da09ac</l7:Id>
        <l7:Type>ENCAPSULATED_ASSERTION</l7:Type>
        <l7:TimeStamp>2021-01-05T21:59:45.724-06:00</l7:TimeStamp>
        <l7:Link rel="self" uri="https://apig.example.com:8443/restman/1.0/encapsulatedAssertions/f380d7b766f92ef13d6238d1c0da09ac"/>
        <l7:Resource>
            <l7:EncapsulatedAssertion id="f380d7b766f92ef13d6238d1c0da09ac" version="10">
                <l7:Name>assertion001</l7:Name>
                <l7:Guid>205ad2a9-8722-4cc4-b5a6-3e1a7356736f</l7:Guid>
                <l7:PolicyReference id="f380d7b766f92ef13d6238d1c0d0ed89" resourceUri="http://ns.l7tech.com/2010/04/gateway-management/policies"/>
                <l7:EncapsulatedArguments>
                    <l7:EncapsulatedAssertionArgument>
                        <l7:Ordinal>1</l7:Ordinal>
                        <l7:ArgumentName>foo</l7:ArgumentName>
                        <l7:ArgumentType>string</l7:ArgumentType>
                        <l7:GuiLabel>foo</l7:GuiLabel>
                        <l7:GuiPrompt>true</l7:GuiPrompt>
                    </l7:EncapsulatedAssertionArgument>
                </l7:EncapsulatedArguments>
                <l7:EncapsulatedResults>
                    <l7:EncapsulatedAssertionResult>
                        <l7:ResultName>bar</l7:ResultName>
                        <l7:ResultType>other</l7:ResultType>
                    </l7:EncapsulatedAssertionResult>
                </l7:EncapsulatedResults>
                <l7:Properties>
                    <l7:Property key="allowTracing">
                        <l7:StringValue>false</l7:StringValue>
                    </l7:Property>
                    <l7:Property key="description">
                        <l7:StringValue>assertion001 foo bar</l7:StringValue>
                    </l7:Property>
                    <l7:Property key="policyGuid">
                        <l7:StringValue>b44f4478-9c7a-43d2-aee3-2a8faa736ae6</l7:StringValue>
                    </l7:Property>
                </l7:Properties>
            </l7:EncapsulatedAssertion>
        </l7:Resource>
    </l7:Item>
</l7:List>