func (app *builder) WithContent(content Content) Builder {
	app.content = content
	return app
}
WithContent adds a content to the builder
package propositions
import (
	"errors"
	"fmt"
	"github.com/deepvalue-network/software/libs/cryptography/pk/signature"
	"github.com/deepvalue-network/software/libs/hash"
)
type builder struct {
	hashAdapter hash.Adapter
	content     Content
	sigs        []signature.RingSignature
}
func createBuilder(
	hashAdapter hash.Adapter,
) Builder {
	out := builder{
		hashAdapter: hashAdapter,
		content:     nil,
		sigs:        nil,
	}
	return &out
}
func (app *builder) Create() Builder {
	return createBuilder(app.hashAdapter)
}