Empty composer when message is sent

libraries/core/src/main/java/io/element/android/x/core/data/StableCharSequence.kt

@@ -0,0 +1,11 @@
+package io.element.android.x.core.data
+
+/**
+ * Wrapper for a CharSequence, which support mutation of the CharSequence.
+ */
+class StableCharSequence(val charSequence: CharSequence) {
+    private val hash = charSequence.toString().hashCode()
+
+    override fun hashCode() = hash
+    override fun equals(other: Any?) = other is StableCharSequence && other.hash == hash
+}