modify pub visibility for MultisigAccountWithSequenceNumber (#114)

* modify pub visibility for MultisigAccountWithSequenceNumber

* add getter methods

crates/aptos/src/common/types.rs

@@ -1921,6 +1921,12 @@ pub struct MultisigAccount {
     pub(crate) multisig_address: AccountAddress,
 }
 
+impl MultisigAccount {
+    pub fn multisig_address(&self) -> AccountAddress {
+        self.multisig_address
+    }
+}
+
 #[derive(Clone, Debug, Parser, Serialize)]
 pub struct MultisigAccountWithSequenceNumber {
     #[clap(flatten)]
@@ -1930,6 +1936,16 @@ pub struct MultisigAccountWithSequenceNumber {
     pub(crate) sequence_number: u64,
 }
 
+impl MultisigAccountWithSequenceNumber {
+    pub fn multisig_account(&self) -> &MultisigAccount {
+        &self.multisig_account
+    }
+
+    pub fn sequence_number(&self) -> u64 {
+        self.sequence_number
+    }
+}
+
 #[derive(Debug, Parser)]
 pub struct TypeArgVec {
     /// TypeTag arguments separated by spaces.