diff --git a/android/apex.go b/android/apex.go
index cbaf1c7..d2fb6a1 100644
--- a/android/apex.go
+++ b/android/apex.go
@@ -32,6 +32,14 @@
 	MinSdkVersion int
 }
 
+// Extracted from ApexModule to make it easier to define custom subsets of the
+// ApexModule interface and improve code navigation within the IDE.
+type DepIsInSameApex interface {
+	// DepIsInSameApex tests if the other module 'dep' is installed to the same
+	// APEX as this module
+	DepIsInSameApex(ctx BaseModuleContext, dep Module) bool
+}
+
 // ApexModule is the interface that a module type is expected to implement if
 // the module has to be built differently depending on whether the module
 // is destined for an apex or not (installed to one of the regular partitions).
@@ -49,6 +57,8 @@
 // respectively.
 type ApexModule interface {
 	Module
+	DepIsInSameApex
+
 	apexModuleBase() *ApexModuleBase
 
 	// Marks that this module should be built for the specified APEXes.
@@ -88,10 +98,6 @@
 	// Tests if this module is available for the specified APEX or ":platform"
 	AvailableFor(what string) bool
 
-	// DepIsInSameApex tests if the other module 'dep' is installed to the same
-	// APEX as this module
-	DepIsInSameApex(ctx BaseModuleContext, dep Module) bool
-
 	// Returns the highest version which is <= maxSdkVersion.
 	// For example, with maxSdkVersion is 10 and versionList is [9,11]
 	// it returns 9 as string
diff --git a/android/sdk.go b/android/sdk.go
index 78e88a0..2fdaf35 100644
--- a/android/sdk.go
+++ b/android/sdk.go
@@ -22,17 +22,30 @@
 	"github.com/google/blueprint/proptools"
 )
 
+// Extracted from SdkAware to make it easier to define custom subsets of the
+// SdkAware interface and improve code navigation within the IDE.
+//
+// In addition to its use in SdkAware this interface must also be implemented by
+// APEX to specify the SDKs required by that module and its contents. e.g. APEX
+// is expected to implement RequiredSdks() by reading its own properties like
+// `uses_sdks`.
+type RequiredSdks interface {
+	// The set of SDKs required by an APEX and its contents.
+	RequiredSdks() SdkRefs
+}
+
 // SdkAware is the interface that must be supported by any module to become a member of SDK or to be
 // built with SDK
 type SdkAware interface {
 	Module
+	RequiredSdks
+
 	sdkBase() *SdkBase
 	MakeMemberOf(sdk SdkRef)
 	IsInAnySdk() bool
 	ContainingSdk() SdkRef
 	MemberName() string
 	BuildWithSdks(sdks SdkRefs)
-	RequiredSdks() SdkRefs
 }
 
 // SdkRef refers to a version of an SDK
diff --git a/apex/apex.go b/apex/apex.go
index bb46612..eb87ecf 100644
--- a/apex/apex.go
+++ b/apex/apex.go
@@ -862,9 +862,7 @@
 		return
 	}
 
-	cur := mctx.Module().(interface {
-		DepIsInSameApex(android.BaseModuleContext, android.Module) bool
-	})
+	cur := mctx.Module().(android.DepIsInSameApex)
 
 	mctx.VisitDirectDeps(func(child android.Module) {
 		depName := mctx.OtherModuleName(child)
diff --git a/sdk/sdk.go b/sdk/sdk.go
index dabdf85..a5709ac 100644
--- a/sdk/sdk.go
+++ b/sdk/sdk.go
@@ -434,8 +434,8 @@
 // Step 6: ensure that the dependencies from outside of the APEX are all from the required SDKs
 func sdkRequirementsMutator(mctx android.TopDownMutatorContext) {
 	if m, ok := mctx.Module().(interface {
-		DepIsInSameApex(ctx android.BaseModuleContext, dep android.Module) bool
-		RequiredSdks() android.SdkRefs
+		android.DepIsInSameApex
+		android.RequiredSdks
 	}); ok {
 		requiredSdks := m.RequiredSdks()
 		if len(requiredSdks) == 0 {