feat: add overload to get instruction as type

src/main/kotlin/app/revanced/patcher/extensions/Extensions.kt

@@ -101,12 +101,20 @@ fun MutableMethod.removeInstruction(index: Int) = this.implementation!!.removeIn
 fun MutableMethod.label(index: Int) = this.implementation!!.newLabelForIndex(index)
 
 /**
- * Get the instruction at the given index in the method's implementation.
+ * Get an instruction at the given index in the method's implementation.
  * @param index The index to get the instruction at.
  * @return The instruction.
  */
 fun MutableMethod.instruction(index: Int): BuilderInstruction = this.implementation!!.instructions[index]
 
+/**
+ * Get an instruction at the given index in the method's implementation.
+ * @param index The index to get the instruction at.
+ * @param T The type of instruction to return.
+ * @return The instruction.
+ */
+fun <T> MutableMethod.instruction(index: Int): T = instruction(index) as T
+
 /**
  * Add smali instructions to the method.
  * @param index The index to insert the instructions at.

src/test/kotlin/app/revanced/patcher/util/smali/InlineSmaliCompilerTest.kt

@@ -44,7 +44,7 @@ internal class InlineSmaliCompilerTest {
             """
         )
 
-        val insn = method.instruction(insnIndex) as BuilderInstruction21t
+        val insn = method.instruction<BuilderInstruction21t>(insnIndex)
         assertEquals(targetIndex, insn.target.location.index)
     }
 
@@ -73,7 +73,7 @@ internal class InlineSmaliCompilerTest {
             )
         )
 
-        val insn = method.instruction(insnIndex) as BuilderInstruction21t
+        val insn = method.instruction<BuilderInstruction21t>(insnIndex)
         assertTrue(insn.target.isPlaced, "Label was not placed")
         assertEquals(labelIndex, insn.target.location.index)
     }