shadowapi/src/main/java/org/robolectric/util/ReflectionHelpers.java
public static <R> R callStaticMethod(
      ClassLoader classLoader,
      String fullyQualifiedClassName,
      String methodName,
      ClassParameter<?>... classParameters) {
    Class<?> clazz = loadClass(classLoader, fullyQualifiedClassName);
    return callStaticMethod(clazz, methodName, classParameters);
  }
public static <R> R callStaticMethod(
      ClassLoader classLoader,
      String fullyQualifiedClassName,
      String methodName,
      ClassParameter<?>... classParameters) {
    Class<?> clazz = loadClass(classLoader, fullyQualifiedClassName);
    return callStaticMethod(clazz, methodName, classParameters);
  }
Helper method for calling a static method using a class from a custom class loader

@param classLoader
@param fullyQualifiedClassName
@param methodName
@param classParameters
@param <R>
@return