1. An apparatus for supporting visualization of a connection relationship among a plurality of components, the apparatus comprising: a processor including: a recognition unit for recognizing the connection relationship among the plurality of components, the connection relationship including a connection from a first component to at least two components and a connection from at least a second component and a third component to a single component; and a generation unit for generating tree structure data in which the connection relationship is represented in a tree structure, by associating the first component with a first node, by associating the at least two components with at least two child nodes of the first node, respectively, by associating the second component with a second node, by associating the third component with a third node different from the second node, and by associating the single component with a child node of the second node and with a child node of the third node in a duplicated manner.