public String getProperties() {
        return this.properties;
    }
<p>
A content map of API-specific key-value pairs describing the targeted API entity. The map must be encoded as a
JSON string, e.g., <code>"{ \"description\": \"The API does ...\" }"</code>. Only OpenAPI-compliant
documentation-related fields from the properties map are exported and, hence, published as part of the API entity
definitions, while the original documentation parts are exported in a OpenAPI extension of
<code>x-amazon-apigateway-documentation</code>.
</p>

@return A content map of API-specific key-value pairs describing the targeted API entity. The map must be encoded
        as a JSON string, e.g., <code>"{ \"description\": \"The API does ...\" }"</code>. Only OpenAPI-compliant
        documentation-related fields from the properties map are exported and, hence, published as part of the
        API entity definitions, while the original documentation parts are exported in a OpenAPI extension of
        <code>x-amazon-apigateway-documentation</code>.
aws-java-sdk-api-gateway/src/main/java/com/amazonaws/services/apigateway/model/CreateDocumentationPartResult.java