1. A device, comprising: one or more processors to: select a program code function associated with a graphical model, the program code function including a set of identifiers; select an identifier of the set of identifiers; determine a particular set of entities that are referenceable at a program code location of the identifier, the particular set of entities including: a first set of entities of the program code function for which the identifier is within a lexical scope of the first set of entities, and a second set of entities of the graphical model for which the program code function is within a graphical scope of the second set of entities, the program code function being a C-function associated with C programming language, and where the one or more processors, when determining the particular set of entities that are referenceable at the program code location of the identifier, are further to: determine one or more entities of the C-function that are referenceable at the program code location of the identifier, determine a lexical scope within the C-function for the one or more entities of the C-function, and select, as the first set of entities of the program code function, the one or more entities of the C-function that are referenceable at the program code location of the identifier based on the lexical scope of the one or more entities of the C-function; determine whether the identifier corresponds to a particular entity of the particular set of entities that are referenceable at the program code location of the identifier; and provide information associated with determining whether the identifier corresponds to the particular entity.