@brief Create a new vertex in vertexCollectionName

`graph.vertexCollectionName.save(data)`

@PARAMS

@PARAM{data, object, required}
JSON data of vertex.

@EXAMPLES

@EXAMPLE_ARANGOSH_OUTPUT{generalGraphVertexCollectionSave}
  var examples = require("@arangodb/graph-examples/example-graph.js");
  var graph = examples.loadGraph("social");
  graph.male.save({name: "Floyd", _key: "floyd"});
~ examples.dropGraph("social");
@END_EXAMPLE_ARANGOSH_OUTPUT