\begin{ccRefConcept}{CircularKernel::LineArc_2} \ccDefinition Concept for line segments supported by a line that is a model of \ccc{Kernel::Line_2} and whose endpoints are models of the \ccc{CircularKernel::CircularArcPoint_2} concept. \ccRefines CopyConstructible, Assignable, DefaultConstructible \ccHasModels \ccc{CGAL::Line_arc_2} \end{ccRefConcept}