Swagger 2.0 high level model going in now

Shifting a few high level models around that are also shared. now it's just a churn game to flesh the high level model and test it up.

datamodel/high/base/example.go

@@ -0,0 +1,42 @@
+// Copyright 2022 Princess B33f Heavy Industries / Dave Shanley
+// SPDX-License-Identifier: MIT
+
+package base
+
+import (
+	"github.com/pb33f/libopenapi/datamodel/high"
+	lowmodel "github.com/pb33f/libopenapi/datamodel/low"
+	low "github.com/pb33f/libopenapi/datamodel/low/base"
+)
+
+type Example struct {
+	Summary       string
+	Description   string
+	Value         any
+	ExternalValue string
+	Extensions    map[string]any
+	low           *low.Example
+}
+
+func NewExample(example *low.Example) *Example {
+	e := new(Example)
+	e.low = example
+	e.Summary = example.Summary.Value
+	e.Description = example.Description.Value
+	e.Value = example.Value
+	e.ExternalValue = example.ExternalValue.Value
+	e.Extensions = high.ExtractExtensions(example.Extensions)
+	return e
+}
+
+func (e *Example) GoLow() *low.Example {
+	return e.low
+}
+
+func ExtractExamples(elements map[lowmodel.KeyReference[string]]lowmodel.ValueReference[*low.Example]) map[string]*Example {
+	extracted := make(map[string]*Example)
+	for k, v := range elements {
+		extracted[k.Value] = NewExample(v.Value)
+	}
+	return extracted
+}