fix single extending doc

Author: TorstenDittmann

templates/web/src/sdk.ts.twig

@@ -449,7 +449,7 @@ class {{ spec.title | caseUcfirst }} {
          * @returns {% if method.type == 'webAuth' %}{void|string}{% elseif method.type == 'location' %}{URL}{% else %}{Promise}{% endif %}
 
          */
-        {{ method.name | caseCamel }}: {% if method.type != 'location' and method.type != 'webAuth'%}async {% for property in spec.definitions[method.responseModel].properties %}{% if spec.definitions[property.sub_schema].additionalProperties %}<{{property.sub_schema | caseUcfirst}} extends Models.{{property.sub_schema | caseUcfirst}}>{% endif %}{% endfor %}{% endif %}({% for parameter in method.parameters.all %}{{ parameter.name | caseCamel | escapeKeyword }}{% if not parameter.required %}?{% endif %}: {{ parameter.type | typeName }}{% if not loop.last %}, {% endif %}{% endfor %}): {% if method.type == 'webAuth' %}void | URL{% elseif method.type == 'location' %}URL{% else %}Promise<{% if method.responseModel and method.responseModel != 'any' %}Models.{{method.responseModel | caseUcfirst}}{% for property in spec.definitions[method.responseModel].properties %}{% if spec.definitions[property.sub_schema].additionalProperties %}<{{property.sub_schema | caseUcfirst}}>{% endif %}{% endfor %}{% else %}{}{% endif %}>{% endif %} => {
+        {{ method.name | caseCamel }}: {% if method.type != 'location' and method.type != 'webAuth'%}async {% if spec.definitions[method.responseModel].additionalProperties %}<{{method.responseModel | caseUcfirst}} extends Models.{{method.responseModel | caseUcfirst}}>{% endif %}{% for property in spec.definitions[method.responseModel].properties %}{% if spec.definitions[property.sub_schema].additionalProperties %}<{{property.sub_schema | caseUcfirst}} extends Models.{{property.sub_schema | caseUcfirst}}>{% endif %}{% endfor %}{% endif %}({% for parameter in method.parameters.all %}{{ parameter.name | caseCamel | escapeKeyword }}{% if not parameter.required %}?{% endif %}: {{ parameter.type | typeName }}{% if not loop.last %}, {% endif %}{% endfor %}): {% if method.type == 'webAuth' %}void | URL{% elseif method.type == 'location' %}URL{% else %}Promise<{% if method.responseModel and method.responseModel != 'any' %}{% if not spec.definitions[method.responseModel].additionalProperties %}Models.{% endif %}{{method.responseModel | caseUcfirst}}{% for property in spec.definitions[method.responseModel].properties %}{% if spec.definitions[property.sub_schema].additionalProperties %}<{{property.sub_schema | caseUcfirst}}>{% endif %}{% endfor %}{% else %}{}{% endif %}>{% endif %} => {
 {% for parameter in method.parameters.all %}
 {% if parameter.required %}
             if (typeof {{ parameter.name | caseCamel | escapeKeyword }} === 'undefined') {