func BeginBlockEntry(height int64) OperationEntry {
	return NewOperationEntry(BeginBlockEntryKind, height, -1, nil)
}
BeginBlockEntry - operation entry for begin block
package simulation
import (
	"encoding/json"
	"math/rand"
	"sort"
	"github.com/Dipper-Labs/Dipper-Protocol/types/simulation"
)
const (
	BeginBlockEntryKind = "begin_block"
	EndBlockEntryKind   = "end_block"
	MsgEntryKind        = "msg"
	QueuedMsgEntryKind  = "queued_msg"
)
type OperationEntry struct {
	EntryKind string          `json:"entry_kind" yaml:"entry_kind"`
	Height    int64           `json:"height" yaml:"height"`
	Order     int64           `json:"order" yaml:"order"`
	Operation json.RawMessage `json:"operation" yaml:"operation"`
}
func NewOperationEntry(entry string, height, order int64, op json.RawMessage) OperationEntry {
	return OperationEntry{
		EntryKind: entry,
		Height:    height,
		Order:     order,
		Operation: op,
	}
}