diff --git a/alib2data/src/common/SparseBoolVector.hpp b/alib2data/src/common/SparseBoolVector.hpp
index e2f60074a4b68613ad52d10dac0d349b5f7993d3..e96bf1afdb96368ca4cccf30465b6004c165047c 100644
--- a/alib2data/src/common/SparseBoolVector.hpp
+++ b/alib2data/src/common/SparseBoolVector.hpp
@@ -26,6 +26,9 @@
 namespace common {
 
 class SparseBoolVector {
+
+// --------------------------------------------------------------------------------------------------------------------------------------------------
+
 	struct element {
 		unsigned run;
 		unsigned word;
@@ -49,6 +52,8 @@ class SparseBoolVector {
 		return ( ( 1u ) << dist ) - 1;
 	}
 
+// --------------------------------------------------------------------------------------------------------------------------------------------------
+
 	void packData ( ) {
 		size_t sizeWithin = m_Size % ( sizeof ( unsigned ) * 8 );
 		long long sizeBlocks = m_Size / ( sizeof ( unsigned ) * 8 ) + ( bool ) sizeWithin;
@@ -88,6 +93,8 @@ class SparseBoolVector {
 		}
 	}
 
+// --------------------------------------------------------------------------------------------------------------------------------------------------
+
 public:
 	SparseBoolVector ( ) : m_Size ( 0 ) { }
 
@@ -97,6 +104,8 @@ public:
 		}
 	}
 
+// --------------------------------------------------------------------------------------------------------------------------------------------------
+
 	void push_back ( bool boolean ) {
 		size_t sizeWithin = m_Size % ( sizeof ( unsigned ) * 8 );
 
@@ -112,6 +121,8 @@ public:
 		m_Size += 1;
 	}
 
+// --------------------------------------------------------------------------------------------------------------------------------------------------
+
 	bool operator [] ( size_t index ) const {
 		size_t sizeWithin = index % ( sizeof ( unsigned ) * 8 );
 		size_t sizeBlocks = index / ( sizeof ( unsigned ) * 8 );
@@ -173,6 +184,8 @@ public:
 		return BitReference ( m_Data, elementIter, sizeWithin, sizeBlocks );
 	}
 
+// --------------------------------------------------------------------------------------------------------------------------------------------------
+
 	operator std::vector < bool > ( ) const {
 		std::vector < bool > res;
 
@@ -191,6 +204,8 @@ public:
 		return res;
 	}
 
+// --------------------------------------------------------------------------------------------------------------------------------------------------
+
 	const std::list < element > & data ( ) {
 		return m_Data;
 	}
@@ -210,6 +225,8 @@ public:
 		return m_Size;
 	}
 
+// --------------------------------------------------------------------------------------------------------------------------------------------------
+
 	friend bool operator == ( const SparseBoolVector & first, const SparseBoolVector & second ) {
 		return first.m_Size == second.m_Size && first.m_Data == second.m_Data;
 	}
@@ -237,6 +254,8 @@ public:
 		return ! ( first < second );
 	}
 
+// --------------------------------------------------------------------------------------------------------------------------------------------------
+
 	friend SparseBoolVector & operator <<= ( SparseBoolVector & A, size_t dist ) {
 		if ( A.m_Size == 0 || dist == 0 )
 			return A;
@@ -280,6 +299,8 @@ public:
 		return A;
 	}
 
+// --------------------------------------------------------------------------------------------------------------------------------------------------
+
 	friend std::ostream & operator << ( std::ostream & out, const common::SparseBoolVector::element & elem ) {
 		out << "(" << elem.run << ", ";
 		for ( unsigned i = 0; i < sizeof ( elem.word ) * 8; ++ i )
@@ -288,6 +309,8 @@ public:
 		return out;
 	}
 
+// --------------------------------------------------------------------------------------------------------------------------------------------------
+
 	class SparseBoolVectorOnesIterator {
 		std::list < element >::const_iterator underlying;
 		std::list < element >::const_iterator underlyingEnd;
@@ -379,6 +402,8 @@ public:
 		return SparseBoolVectorOnesIterator ( m_Data.end ( ), m_Data.end ( ), m_Size );
 	}
 
+// --------------------------------------------------------------------------------------------------------------------------------------------------
+
 };
 
 } /* namespace common */