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diff --git a/src/common/iBatteryPlugin.vala b/src/common/iBatteryPlugin.vala
index a4b3502..5514cc3 100644
--- a/src/common/iBatteryPlugin.vala
+++ b/src/common/iBatteryPlugin.vala
@@ -76,7 +76,7 @@ namespace IndicatorKDEConnect {
}
protected void int32_signal_cb (DBusConnection con,
- string sender,
+ string? sender,
string object,
string interface,
string signal_name,
@@ -87,7 +87,7 @@ namespace IndicatorKDEConnect {
}
protected void boolean_signal_cb (DBusConnection con,
- string sender,
+ string? sender,
string object,
string interface,
string signal_name,
diff --git a/src/common/iDaemonPlugin.vala b/src/common/iDaemonPlugin.vala
index 8653729..201da90 100644
--- a/src/common/iDaemonPlugin.vala
+++ b/src/common/iDaemonPlugin.vala
@@ -114,7 +114,7 @@ namespace IndicatorKDEConnect {
/*Signals Callbacks*/
protected virtual void device_added_cb (DBusConnection con,
- string sender,
+ string? sender,
string object,
string interface,
string signal_name,
@@ -128,7 +128,7 @@ namespace IndicatorKDEConnect {
}
protected virtual void device_removed_cb (DBusConnection con,
- string sender,
+ string? sender,
string object,
string interface,
string signal_name,
@@ -142,7 +142,7 @@ namespace IndicatorKDEConnect {
}
protected virtual void device_visibility_changed_cb (DBusConnection con,
- string sender,
+ string? sender,
string object,
string interface,
string signal_name,
@@ -157,7 +157,7 @@ namespace IndicatorKDEConnect {
}
protected virtual void pairing_requests_changed_cb (DBusConnection con,
- string sender,
+ string? sender,
string object,
string interface,
string signal_name,
diff --git a/src/common/iDevicePlugin.vala b/src/common/iDevicePlugin.vala
index 8570775..bad3eac 100644
--- a/src/common/iDevicePlugin.vala
+++ b/src/common/iDevicePlugin.vala
@@ -237,7 +237,7 @@ namespace IndicatorKDEConnect {
/*Callbacks */
protected void void_signal_cb (DBusConnection con,
- string sender,
+ string? sender,
string object,
string interface,
string signal_name,
@@ -253,7 +253,7 @@ namespace IndicatorKDEConnect {
}
protected void string_signal_cb (DBusConnection con,
- string sender,
+ string? sender,
string object,
string interface,
string signal_name,
@@ -273,7 +273,7 @@ namespace IndicatorKDEConnect {
}
protected void boolean_signal_cb (DBusConnection con,
- string sender,
+ string? sender,
string object,
string interface,
string signal_name,
diff --git a/src/common/iSignals.vala b/src/common/iSignals.vala
index 52c2b82..1eb390b 100644
--- a/src/common/iSignals.vala
+++ b/src/common/iSignals.vala
@@ -6,7 +6,7 @@
namespace IndicatorKDEConnect {
public interface ISignals : Object {
public virtual void void_signal_cb (DBusConnection con,
- string sender,
+ string? sender,
string object,
string interface,
string signal_name,
@@ -16,7 +16,7 @@ namespace IndicatorKDEConnect {
}
public virtual void boolean_signal_cb (DBusConnection con,
- string sender,
+ string? sender,
string object,
string interface,
string signal_name,
@@ -26,7 +26,7 @@ namespace IndicatorKDEConnect {
}
public virtual void string_signal_cb (DBusConnection con,
- string sender,
+ string? sender,
string object,
string interface,
string signal_name,
@@ -36,7 +36,7 @@ namespace IndicatorKDEConnect {
}
public virtual void int32_signal_cb (DBusConnection con,
- string sender,
+ string? sender,
string object,
string interface,
string signal_name,
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