12. A system comprising: at least one processor; and at least one machine-readable medium storing instructions that, when executed by the at least one processor, cause the at least one processor to perform operations comprising: generating a runtime model of a business object comprising a hierarchy of business object nodes, the runtime model comprising a plurality of structural entities and a plurality of functional entities, the structural entities each encapsulating data values and the functional entities each performing at least one function; instantiating a simulation runtime model of the business object, the simulation runtime model comprising a plurality of pseudo-structural entities and a plurality of pseudo-functional entities, the pseudo-structural entities each encapsulating data values and the pseudo-functional entities each performing at least one function; selecting, during the simulation runtime model, a predetermined business object service of the business object and determining at least one parameter of the predetermined business object service; replacing, during the simulation runtime model, references in code to the plurality of functional entities of the runtime model with references to the plurality of pseudo-functional entities of the simulation runtime model; and executing, during the simulation runtime model, the simulation runtime model using the plurality of pseudo-functional entities.
12. A system comprising: at least one processor; and at least one machine-readable medium storing instructions that, when executed by the at least one processor, cause the at least one processor to perform operations comprising: generating a runtime model of a business object comprising a hierarchy of business object nodes, the runtime model comprising a plurality of structural entities and a plurality of functional entities, the structural entities each encapsulating data values and the functional entities each performing at least one function; instantiating a simulation runtime model of the business object, the simulation runtime model comprising a plurality of pseudo-structural entities and a plurality of pseudo-functional entities, the pseudo-structural entities each encapsulating data values and the pseudo-functional entities each performing at least one function; selecting, during the simulation runtime model, a predetermined business object service of the business object and determining at least one parameter of the predetermined business object service; replacing, during the simulation runtime model, references in code to the plurality of functional entities of the runtime model with references to the plurality of pseudo-functional entities of the simulation runtime model; and executing, during the simulation runtime model, the simulation runtime model using the plurality of pseudo-functional entities. 13. A system as in claim 12 , wherein the operations further comprise determining, during execution of the simulation runtime model, a response of the plurality of pseudo-functional entities.