@Nullable
	public MethodVertex getVertex(@Nonnull MethodMember method) {
		ClassInfo declaringClass = method.getDeclaringClass();
		if (declaringClass == null) return null;
		return getClassMethodsContainer(declaringClass.asJvmClass()).getVertex(method);
	}
@param method
		Method to get vertex of.

@return Vertex of method. Can be {@code null} if the method member does not
define its {@link MethodMember#getDeclaringClass() declaring class}.
recaf-core/src/main/java/software/coley/recaf/services/callgraph/CallGraph.java